See us on:
Visit CP on Facebook Visit CP on Twitter Visit CP on YouTube
Is your boat in the gallery?
Image Gallery  
Instructions & Guides:
Instructions  
Find Parts by Mercury Model:
OEM Part Finder  
What's on sale today?
Sale Specials  
What are you looking for Today?

Need Help? Call Us:

1-800-225-9871

Outside the USA? Call 707-585-9871

LS Engine Parts and Accessories

Big Block Chevy Crossover Style Serpentine Drive Kit
Starting From:
$1,999.99

This Part has options, please click the button below to order.

Billet-Track Serpentine Drive Kit for LS1, LS2, LS3, and LS6

625-83 + Option(s)

LS platform is rapidly being recognized by boaters around the world as the current and future platform for performance and reliability. Hardin Marine has always been at the forefront of engine development and the new Billet-Track LS accessory kit is just one more example.The perfect solution for mounting accessory components on the popular LS-1, LS-2, LS-3 and LS-6 used in engine swap applications.

The kit is engineered from 6061-T6 aluminum is precision CNC machined for strength and perfect fitment keeping a tight profile to the engine block. This all in one system kit includes a custom aluminum circulating pump, Billet crank pulley, Hardin Marine stainless steel water pump and billet pulley, power steering pump and billet pulley, High output 100amp alternator, Polished billet aluminum brackets and hardware, Stainless steel water inlet tube, and to keep it all spinning in style under constant tension a billet aluminum belt tensioner.

While the system is offered with or without a closed cooling tank it MUST USE a closed cooled tank of some kind. This system in not designed for raw water cooling. System engineered to work with Fluidamper balancer #212-620121

  • 100 amp internal fan alternator
  • Billet polished aluminum alternator pulley
  • Natural finish custom aluminum LS circulating water pump
  • Billet Polished aluminum circulating water pump pulley
  • Billet Polished aluminum accessory bracket
  • Billet Polished aluminum Serpentine belt tensioner 
  • Billet Polished aluminum tensioner pulley
  • Billet Polished aluminum crankshaft pulley
  • Goodyear Gatorback serpentine belt
  • Polished Stainless Steel water inlet tube (With Closed Cooling Package Only)

GM LS Series Remote Side Mount Oil Filter Adapter
Your Price:
$200.95

GM LS Series Remote Side Mount Oil Filter Adapter

625-4526

GM LS Series Remote Side Mount Oil Filter Adapter

Earl's billet side mount oil cooler adapters are the slick way to add an oil cooler to your GM LS or Gen-V LT engine. The slim design of these adapters clear most headers and other components and feature -10 AN male connections. These adapters are black anodized and use O-Ring seals for a leak free installation. Fits OEM & Holley Wet Sump oil pans only (Does not Fit Dry Sump Engines).

  • Billet Aluminum w/ Black Anodized Finish
  • Includes 0-Ring Seal & Hardware
  • (2) 1/8” NPT Accessory Ports
  • -10 AN Male Connections
  • Available w/ 180 Degree Thermostat
  • Add an Earl’s Oil Cooler and AN Plumbing to Complete the Installation

LS1 14mm PTO 1310 Adapter Bolt Kit
Your Price:
$54.99

LS PTO 1310 Adapter Long Bolt Kit

500-2160

LS PTO 1310 Adapter Bolt Kit

This is a special metric long bolt kit for 1310 LS PTO's. See additional info below for fitment.

Contains (6) M11x1.5x44 Bolts and (4) 3/8"-24 x 1" bolts


LS1 14mm PTO 1310 Adapter Bolt Kit
Your Price:
$54.99

LS PTO 1350 Adapter Long Bolt Kit

500-2162

LS PTO 1350 Adapter Bolt Kit

This is a special metric long bolt kit for 1350 LS PTO's. See additional info below for fitment.

Contains (6) M11x1.5x44 Bolts and (4) 7/16" x 1" bolts


LS Crossover and Thermostat
Your Price:
$559.99

Water Inlet Crossover Kit for GM LS Engines

625-4525

Water Inlet Crossover Kit for GM LS Engines

These new adapters and crossover tubes allow easy installation of a remote mounted electric water pump on the GM LS engine. These billet aluminum block adapters feature (4) -12 AN O-ring female ports for routing water to a remote mounted electric water pump. The 1/8" NPT Port can be used to connect to the steam tube plumbing.


LS1 Small Block Chevy Exhaust System
Your Price:
$2,699.99

LS Marine Aluminum Exhaust Manifold System with Stainless Risers for GM 4.8, 5.3, 6.0, 6.2

620-32942

GM LS Aluminum Exhaust Manifold system with Stainless Risers for 4.8, 5.3, 6.0, 6.2, Aluminum 4" Exhaust System

The NEW LS Aluminum manifolds is popular on OEM based Aluminum exhaust system is popular on production GM LS based engine platforms up to the GM LSA of 550HP. This system features a single o2 sensor bung provision on one of the exhaust risers..The system features both fresh water and closed cooling plumbing options. a 4" exhaust hose connection is standard. See the link for installation instruction for further sizing specifications. Not for use with engines using a camshaft with more than .216 @ .050 Camshaft Duration. Risers are polished stainless steel.

ATTENTION** This Exhaust Manifolds in this System are sold in a raw Aluminum "As-Cast" satin finish, Installer will be required to apply any final finish as the outside is ROUGH aluminum. Sanding, Polishing, Powder coating or Painting is the responsibility of the purchaser!


Cyclone Header System For GM Big Block Standard Dimension Bravo
Your Price:
$3,999.99

Cyclone Header System For GM LS Standard Bravo Tailpipes

620-32570

Cyclone Water Jacketed Header System For GM LS and Standard Dimension Bravo - Fully Polished

This new cyclone header system is designed specifically for GM LS engines. The tailpipes are set up for standard Bravo exit locations.

This Cyclone wet exhaust series header works perfectly on both stock and modified performance applications This header mixes engine cooling water with the exhaust near the end of the tailpipe That allows you to use a 4" rubber hose connection to attach your transom mounted exhaust tips This is the perfect replacement for your factory exhaust system Oil filter, shift control, ECU brackets, gaskets, and bolts included.

If you are one of thousands of performance boaters oseeking the power and styling from stainless steel tubular headers then you're looking at the leader in exhaust technology These "Cyclone" header systems share 100% 316L stainless steel construction. All appropriate flanges are laser cut and CNC machined for a perfect gasket seal. Each individual exhaust tube is bent to precise, exact tolerances every time. A computer designed fully welded water inlet manifold provides equal water distribution to each exhaust runner tube. While each set of headers goes through a 1900 degree annealing process that multiplies the durability factor of the header many times over while providing added protection against corrosion. But the heart of these systems lies in the ability to generate loads of additional power. By using CAD-5 Technology to develop a unique staggered tube runner length, these systems are capable of maximizing the broadest low end and midrange torque, all the while yielding incredible peak power gains. These systems are available in many configurations to fit every boaters needs. Rest assured when you lay down your hard earned money because the system comes complete with all necessary mounting bolts, gaskets, and shift and oil filter brackets making installation a snap. This kit includes one (1) O2 bung standard, if you need a 2nd O2 bung on your kit, see related parts below.

Additional Information:


Cyclone Header System For GM Big Block Standard Dimension Bravo
Your Price:
$4,199.99

Cyclone Header System For GM LS with Turbo Adapter Flange

620-32560

Cyclone Water Jacketed Header System For GM LS with Turbo Adapter Flange  - Fully Polished

This new cyclone header system is designed specifically for GM LS engines. The header has an adapter flange set up to easily adapt a turbo for use with the system.

This Cyclone wet exhaust series header works perfectly on both stock and modified performance applications This header mixes engine cooling water with the exhaust near the end of the tailpipe That allows you to use a 4" rubber hose connection to attach your transom mounted exhaust tips This is the perfect replacement for your factory exhaust system Oil filter, shift control, ECU brackets, gaskets, and bolts included.

If you are one of thousands of performance boaters seeking the power and styling from stainless steel tubular headers then you're looking at the leader in exhaust technology These "Cyclone" header systems share 100% 316L stainless steel construction. All appropriate flanges are laser cut and CNC machined for a perfect gasket seal. Each individual exhaust tube is bent to precise, exact tolerances every time. A computer designed fully welded water inlet manifold provides equal water distribution to each exhaust runner tube. While each set of headers goes through a 1900 degree annealing process that multiplies the durability factor of the header many times over while providing added protection against corrosion. But the heart of these systems lies in the ability to generate loads of additional power. By using CAD-5 Technology to develop a unique staggered tube runner length, these systems are capable of maximizing the broadest low end and midrange torque, all the while yielding incredible peak power gains. These systems are available in many configurations to fit every boaters needs. Rest assured when you lay down your hard earned money because the system comes complete with all necessary mounting bolts, gaskets, and shift and oil filter brackets making installation a snap.

Additional Information:


Custom Lightning Exhaust Headers for LS Applications (Quote Only)

Starting From:
$0.00

This Part has options, please click the button below to order.

Custom Lightning Exhaust Headers for LS Applications (Quote Only)

310-Headers-LS + Option(s)

NOTE: Custom Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers
Lightning Mercury Headers
Lightning Generic Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Standard Jacketed Header - S/B Chevy 350 Mercury 31" Wide
Starting From:
$2,499.99

This Part has options, please click the button below to order.

Lightning GM LS 4.8, 5.3, 6.0, 6.2, 7.0L Fresh Water Jet Headers

310-40 + Option(s)

Standard Jacketed Header - S/B Chevy LS1 Jet Boat

These headers are designed to be a replacement for Mercury, OMC or jet manifolds. However, they terminate approximately 8" aft of stock manifolds and are projected to meet the exhaust tips providing they are in the stock location. Headers will have about 1/2" clearance between header and tall Moroso valve covers. Headers come complete with bolts, gaskets, waterfittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.

LIGHTNING PERFORMANCE
When comparing performance exhaust systems it's good to understand the different systems on the market today and the performance demands of your engine. Understanding how a header works will help you decide on which exhaust system is best suited for your application.

Headers have two basic functions. First is to simply relieve back pressure. For example, when looking at a manifold you see a 4" diameter exhaust hose, but the actual exhaust gas opening is about 2-1/2" diameter. Most performance manifolds and some header manufacturers use a 4" exhaust hose and 3" or 3-1/2" OD exhaust gas tube. All of these headers use a 4" OD exhaust gas tube and a 5" water jacket tube until the water gets introduced into the exhaust gas stream, then it gets reduced from 5" to its 4" exhaust hose diameter. At no time does the exhaust gases see a diameter smaller than 4" OD. When looking at these exhaust gas openings consider their area not their diameter. For example, a 4" OD opening has an area of approximately 12.56 sq. in. A 3-1/2" opening has an area of approximately 9.62 sq. in.That is 25% smaller! A 3" opening is approximately 7.06 sq. in. and a 2-1/2" opening is approximately 4.90 sq. in. which is 60% smaller.

LIGHTNING HORSE POWER COMPARISON
Performance figures on headers vary considerably. As a rule, the higher horsepower engines benefit more than the lower horsepower engines. For example, the 330hp Mercury engine will gain approximately 50 to 75 rpm, where as the 365 hp Mercury engine will gain approximately 300 to 400 rpm (45 hp). Blown engines gain up to 800 rpm (80 hp). Of course this is comparing these headers against stock Mercury center rise manifolds.

LIGHTNING CONSTRUCTION
Our Magnum header starts with Mandrel bent 316L stainless steel interior tubes. The exterior tubes are Mandrel bent heavy wall steel tube (.074). The tubes are then mechanically etched by sand blasting and then assembled. Finally, a corrosion resistant silicone ceramic coating is applied to the interior of the header while the exterior receives a powder coat finish.

ALL THIS PLUS THE BEST 2-YEAR WARRANTY IN THE INDUSTRY

Through continuing research Lightning Mfg. has developed a Dual Porcelain Coating that resists the harshest of salt water environments. Now as an option theyare able to apply the same high tech coating to a 316L stainless steel lined header once thought to be the cracking alloy and render it crack resistant.


Standard Jacketed Header - S/B Chevy 350 Mercury 31" Wide
Starting From:
$2,420.99

This Part has options, please click the button below to order.

Lightning GM LS 4.8, 5.3, 6.0, 6.2, 7.0L Fresh Water Mercury Bravo Headers

310-40 + Option(s)

Standard Jacketed Header - S/B Chevy LS1 Mercury

These headers are designed to be a replacement for Mercury, OMC or jet manifolds. However, they terminate approximately 8" aft of stock manifolds and are projected to meet the exhaust tips providing they are in the stock location. Headers will have about 1/2" clearance between header and tall Moroso valve covers. Headers come complete with bolts, gaskets, waterfittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.

LIGHTNING PERFORMANCE
When comparing performance exhaust systems it's good to understand the different systems on the market today and the performance demands of your engine. Understanding how a header works will help you decide on which exhaust system is best suited for your application.

Headers have two basic functions. First is to simply relieve back pressure. For example, when looking at a manifold you see a 4" diameter exhaust hose, but the actual exhaust gas opening is about 2-1/2" diameter. Most performance manifolds and some header manufacturers use a 4" exhaust hose and 3" or 3-1/2" OD exhaust gas tube. All of these headers use a 4" OD exhaust gas tube and a 5" water jacket tube until the water gets introduced into the exhaust gas stream, then it gets reduced from 5" to its 4" exhaust hose diameter. At no time does the exhaust gases see a diameter smaller than 4" OD. When looking at these exhaust gas openings consider their area not their diameter. For example, a 4" OD opening has an area of approximately 12.56 sq. in. A 3-1/2" opening has an area of approximately 9.62 sq. in.That is 25% smaller! A 3" opening is approximately 7.06 sq. in. and a 2-1/2" opening is approximately 4.90 sq. in. which is 60% smaller.

LIGHTNING HORSE POWER COMPARISON
Performance figures on headers vary considerably. As a rule, the higher horsepower engines benefit more than the lower horsepower engines. For example, the 330hp Mercury engine will gain approximately 50 to 75 rpm, where as the 365 hp Mercury engine will gain approximately 300 to 400 rpm (45 hp). Blown engines gain up to 800 rpm (80 hp). Of course this is comparing these headers against stock Mercury center rise manifolds.

LIGHTNING CONSTRUCTION
Our Magnum header starts with Mandrel bent 316L stainless steel interior tubes. The exterior tubes are Mandrel bent heavy wall steel tube (.074). The tubes are then mechanically etched by sand blasting and then assembled. Finally, a corrosion resistant silicone ceramic coating is applied to the interior of the header while the exterior receives a powder coat finish.

ALL THIS PLUS THE BEST 2-YEAR WARRANTY IN THE INDUSTRY

Through continuing research Lightning Mfg. has developed a Dual Porcelain Coating that resists the harshest of salt water environments. Now as an option theyare able to apply the same high tech coating to a 316L stainless steel lined header once thought to be the cracking alloy and render it crack resistant.


Powerflow Small Block Kit with Stainless Risers
Your Price:
$2,499.99

Powerflow Black LS Small Block Kit with Stainless Risers

421-8382

Powerflow LS Small Block Kit with Black Risers

Powerflow now offers a small block system. This system is designed after the big block kit using the same riser system. This system will increase your torque and horsepower by 10%. This kit is powdercoated black.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out. Features an external fitting to accept stock MerCruiser thermostat plumbing.


Powerflow Small Block Kit with Stainless Risers
Your Price:
$2,499.99

Powerflow Polished LS Small Block Kit with Stainless Risers

421-8384

Powerflow LS Small Block Kit with Stainless Risers

Powerflow now offers a small block system. This system is designed after the big block kit using the same riser system. This system will increase your torque and horsepower by 10%. This is fully polished, too.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out. Features an external fitting to accept stock MerCruiser thermostat plumbing.


LS1 Small Block Chevy Exhaust System
Your Price:
$1,399.99

LS Marine Aluminum Exhaust Manifold System for GM 4.8, 5.3, 6.0, 6.2

620-32940

GM LS Aluminum Exhaust Manifold system for 4.8, 5.3, 6.0, 6.2, Aluminum 4" Exhaust System

The NEW LS Aluminum manifolds is popular on OEM based Aluminum exhaust system is popular on production GM LS based engine platforms up to the GM LSA of 550HP. This system features a single o2 sensor bung provision on one of the exhaust risers..The system features both fresh water and closed cooling plumbing options. a 4" exhaust hose connection is standard. See the link for installation instruction for further sizing specifications. Not for use with engines using a camshaft with more than .216 @ .050 Camshaft Duration.

ATTENTION** This Exhaust System is sold in a raw Aluminum "As-Cast" satin finish, Installer will be required to apply any final finish as the outside is ROUGH aluminum. Sanding, Polishing, Powder coating or Painting is the responsibility of the purchaser!


LS1 Small Block Chevy Exhaust System
Your Price:
$200.00

Extra O2 Bung for LS Marine Aluminum Exhaust Manifold System

620-32941

Extra O2 Bung for LS Marine Aluminum Exhaust Manifold System

The 620-32940 Exhaust System comes with a single O2 Bung, however some systems require a 2nd O2 bung. Order this part alongside a 620-32940 system to have two O2 bungs.


LS1 Small Block Chevy Exhaust System
Your Price:
$59.99

ECM Bracket for LS Marine Aluminum Exhaust Manifold System

620-32492

ECM Bracket for LS Marine Aluminum Exhaust Manifold System

Add an ECM bracket to the 620-32940 or 620-32942 LS Exhaust Systems or IMCO LS Exhaust Systems.


LS1 Small Block Chevy Exhaust System
Your Price:
$59.99

Shift Bracket for LS Marine Aluminum Exhaust Manifold System

620-32490

Shift Bracket for LS Marine Aluminum Exhaust Manifold System

Add a shift bracket to the 620-32940 or 620-32942 LS Exhaust Systems or IMCO LS Exhaust Systems.


LS1 Small Block Chevy Exhaust System
Your Price:
$10.99

Riser Gasket for LS Marine Aluminum Exhaust Manifold System

620-32494

Replacement Riser Gasket for LS Marine Aluminum Exhaust Manifold System

Replacement Riser Gasket for the 620-32940 or 620-32942 LS Exhaust Systems or IMCO LS Exhaust Systems.


LS1 Small Block Chevy Exhaust System
Your Price:
$29.99

Exhaust Gaskets for LS Marine Aluminum Exhaust Manifold System

620-32496

Exhaust Gaskets for LS Marine Aluminum Exhaust Manifold System

Replacement Exhaust Gaskets for the 620-32940 or 620-32942 LS Exhaust Systems or IMCO LS Exhaust Systems. Sold in pairs for one engine.


LS1 Small Block Chevy Exhaust System
Your Price:
$1,299.99

Stainless Risers for LS Marine Aluminum Exhaust Manifold System

620-32938

Stainless Steel Risers for LS Marine Aluminum Exhaust Manifold System

Change out the cast aluminum risers on the 620-32940 or 620-32942 LS Exhaust Systems for Stainless Steel ones! Sold in pairs.