Login
See us on:
Visit CP on Facebook Visit CP on Instagram 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 popular today?
Popular Items  
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 - Exhaust Systems and Accessories

LS1 Small Block Chevy Exhaust System
Your Price:
$1,899.99

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

620-32950

LS-M Marine Aluminum Exhaust Manifold system for GM LS BASED 4.8, 5.3, 6.0, 6.2

These Next generation NEW LS-M series Aluminum exhaust manifold system is a perfect complement to OEM GM LS based engine platforms up to the GM LSA of 550HP. The New LS-M Series Manifolds feature DUAL O2 sensor bung provisions mounted sleekly with one in each exhaust riser. The LS-M series exhaust system also features the ability to be plumbed for either fresh water or closed cooling options. 4" exhaust hose connection is standard. Yet another new feature of the LS-M manifolds is their corrosive hard anodizing feature to yet extend longevity in harsh environments. These manifolds were developed on OEM performance engines and are NOT for use with engines using a camshaft with more than .226 @ .050 Camshaft Duration.

ATTENTION** This Exhaust System is sold in a Painted Industrial finish. Installers will be required to apply further extensive aesthetic final detail finishing. The outside is ROUGH machine and sanded aluminum with Industrial grade painting. Additional Sanding, Polishing, Powder coating or Painting is the responsibility of the purchaser!


LS1 Small Block Chevy Exhaust System
Your Price:
$1,699.99

GM LT1 / LT4 Aluminum 4" Marine Exhaust System

620-32939

GM LT1 / LT4 Aluminum 4" Marine Exhaust System

The NEW Aluminum marine GM LT exhaust manifold systems are a popular option for LT1 / LT4 GM OEM and GM Marine based engine platforms up to 550HP. This system features a single o2 sensor bung provision on one of the exhaust risers (a second is optional).The system features a dry-joint style flange that passes water from the manifold to the flange making closed cooling options simple. The exhaust risers feature a 4" exhaust hose connection standard.

Not for use with engines using a camshaft with more than .224 @ .050 Camshaft Duration. 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, coating or Painting is the responsibility of the purchaser!

Note: these are sold as a pair.


Cyclone Header System For GM Big Block Standard Dimension Bravo
Your Price:
$5,299.99

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 - Pair of Headers for one engine.

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.  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 - Pair of Headers for one engine.

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. 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:


CMI LS Chevy E-Top Headers
Starting From:
$4,599.99

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

CMI LS Chevy E-Top Headers

650-1320 + Option(s)

CMI CMI LS Chevy E-Top Headers, Polished or Satin Finish

  • Improved exhaust flow over existing cast manifolds
  • Lightweight 316L stainless steel
  • Increased fuel efficiency
  • Inside port size of 1-5/8", also in 1-7 /8"
  • Smooth mandrel bent tubes
  • No separate tailpipe required
  • Taller custom application options

Note: All CMI Systems are sold without Tailpipes

ALL CMI HEADERS ARE MADE TO ORDER AND SHIP FROM THE FACTORY IN 16-20 WEEKS

Powerflow Small Block Kit with Stainless Risers
Your Price:
$2,799.99

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

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:
$2,699.99

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

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.


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. 

NOTE: LIGHTNING HEADERS HAVE A 4-6 WEEKS BUILD TIME.


LS1 Headers, Jet, Long, Chrome
Your Price:
$1,790.00

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

LS1 Headers, Jet, Long, Chrome

510-9016-1

LS1 Headers, Jet, Long, Chrome

This is the header the Bassett legacy was built on. It's clean smooth flowing shape and high luster chrome are a sure winner anywhere. All original style headers come with gaskets, bolts, tee valve, water injection lines, and hardware.

Sold As A Pair

NOTE: ALL BASSETT HEADERS SHIP SIGNATURE REQUIRED. SOMEONE MUST BE PRESENT TO RECEIVE THE PACKAGE!


LS1 Headers, Jet, Short, Chrome
Your Price:
$1,790.00

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

LS1, LS, LS3 and LS6 Headers, Jet, Short, Chrome

510-9016-2

LS1, LS, LS3 and LS6 Headers, Jet, Short, Chrome

This is the header the Bassett legacy was built on. It's clean smooth flowing shape and high luster chrome are a sure winner anywhere. All original style headers come with gaskets, bolts, tee valve, water injection lines, and hardware.

Sold As A Pair

NOTE: ALL BASSETT HEADERS SHIP SIGNATURE REQUIRED. SOMEONE MUST BE PRESENT TO RECEIVE THE PACKAGE!


LS1 Headers, V-Drive, Long, Chrome
Your Price:
$1,790.00

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

LS1 Headers, V-Drive, Long, Chrome

510-11016-1

LS1 Headers, V-Drive, Long, Chrome

This is the header the Bassett legacy was built on. It's clean smooth flowing shape and high luster chrome are a sure winner anywhere. All original style headers come with gaskets, bolts, tee valve, water injection lines, and hardware.

Sold As A Pair

NOTE: ALL BASSETT HEADERS SHIP SIGNATURE REQUIRED. SOMEONE MUST BE PRESENT TO RECEIVE THE PACKAGE!


LS1 Headers, V-Drive, Short, Chrome
Your Price:
$1,790.00

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

LS1 Headers, V-Drive, Short, Chrome

510-11016-2

LS1 Headers, V-Drive, Short, Chrome

This is the header the Bassett legacy was built on. It's clean smooth flowing shape and high luster chrome are a sure winner anywhere. All original style headers come with gaskets, bolts, tee valve, water injection lines, and hardware.

Sold As A Pair

NOTE: ALL BASSETT HEADERS SHIP SIGNATURE REQUIRED. SOMEONE MUST BE PRESENT TO RECEIVE THE PACKAGE!


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 LT Marine Aluminum Exhaust Manifold System

620-32490

Shift Bracket for LT Marine Aluminum Exhaust Manifold System

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

NOTE: If using with a riser mounted O2 Sensor, modification to bracket will be required or O2 sensor moved inboard.


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:
$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.


GM Gen III/IV Small Block V8. LS Series .030" MLS Exhaust Gaskets.
Your Price:
$37.58

GM Gen III/IV Small Block V8. LS Series .030" MLS Exhaust Gaskets.

302-C5818-030

GM Gen III/IV Small Block V8. LS Series .030" MLS Exhaust Gaskets. - Sold in Pairs

The Cometic Severe Duty Multi Layer Series exhaust gaskets are comprised of three separate layers of stainless steel. Cometic uses stainless steel for increased strength and its ability to rebound from heat compression, plus excellent corrosion resistance. The outer layers of the gasket are embossed and coated. This is designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes.

The Severe Duty MLS exhaust gasket is ideal for both aluminum heads & cast iron heads as well as cast iron and aluminum blocks. The composition of MLS gaskets will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is required and by design promotes an even torque load across the sealing surface.

Sold in Pairs


LS Exhaust Gasket
Your Price:
$32.99

LS Exhaust Gasket

650-34015

LS Exhaust Gasket

Sold Each