All Exhaust Systems by Engine Model - Big Block Chevy 454 / 502, 7.4L / 8.2L Exhaust Systems

Big Block GM H/P Long Riser Kit

This system was designed for mildly modified factory engine packages. It shares the same features as the systems listed above, except its long tailpipe discharges water later in the exhaust stream. This provides some flexibility for mild cam shaft changes. Please consult us for cam shaft compatibility. A measurement sheet must be filled out when purchasing.

Big Block GM Hi-Torque Dry System

This system is designed for heavilymodified engines with large cam shafts and/or high compression It will deliver maximumhorsepower and reliability on naturally aspiratedengines Keep in mind, all dry systems are very loud

Stainless Marine Hi-Torque Gen III - Big Block GM, 4-1/2" Tailpipe, Up To 540 Cubic Inches And Over

These systems are incredible performers They holdboth APBA catamaran and V-bottom records This systemhas recorded speeds in excess of 160 MPH and isdesigned for the person looking for true header performancewith reliability of a manifold system This system isdesigned for large cubic inch and supercharged motors.

Industry wide, Stainless Marine exhaust systems are recognized for increased horsepower,remarkable weight savings, an exclusive five-year warranty and an incredible value.

Tests by both HotBoat and Trailer Boat Magazines revealed increases of 3.2 to 6.5 MPH on MerCruiserBig Blockpowered 22'-24' boats.

The unique construction results in the heaviest manifold weighing only 23 pounds.A huge savings compared to cast iron. Stainless Marine is one of the top quality and leastexpensive systems available today. Note: All systems based on Bravo applications.

Stainless Tail Pipe, Large Collector, V-Band Clamps(No Bolts), 15" Long Runners. Press Formed Water Jacket for Better Cooling. Thick SingleWall Casting. Better Flow Capacity (Larger than Big Tube Headers)

Stainless Marine Hi-Torque Gen III - Big Block GM, 5" Tailpipe, Up To 600 Cubic Inches And Over

These systems are incredible performers They holdboth APBA catamaran and V-bottom records This systemhas recorded speeds in excess of 160 MPH and isdesigned for the person looking for true header performancewith reliability of a manifold system This system isdesigned for large cubic inch and supercharged motors.

Industry wide, Stainless Marine exhaust systems are recognized for increased horsepower,remarkable weight savings, an exclusive five-year warranty and an incredible value.

Tests by both HotBoat and Trailer Boat Magazines revealed increases of 3.2 to 6.5 MPH on MerCruiserBig Blockpowered 22'-24' boats.

 The unique construction results in the heaviest manifold weighing only 23 pounds.A huge savings compared to cast iron. Stainless Marine is one of the top quality and leastexpensive systems available today. Note: All systems based on Bravo applications.

Stainless Tail Pipe, Large Collector, V-Band Clamps(No Bolts), 15" Long Runners. Press Formed Water Jacket for Better Cooling. Thick SingleWall Casting. Better Flow Capacity (Larger than Big Tube Headers)

Thumper Power - Black Big Block Exhaust System w/Shift Bracket

Are your cast iron manifolds failing? This could be the answer. A cost effective lightweight entry level performance system. This system was designed for efficiency and reliability on stock originally equipped engines. Not silent choice compatible.

Thumper Power - Polished Big Block Exhaust System w/Shift Bracket

Are your cast iron manifolds failing? This could be the answer. A cost effective lightweight entry level performance system. This system was designed for efficiency and reliability on stock originally equipped engines. Not silent choice compatible.

Tornado Big Tube Vertical Rise Center Exit Exhaust Headers (Tailpipes NOT Included)

The "NEW" Tornado series Hardin Marine Headers were designed and breed from Hardin Marines racing heritage and achievements.  The unique center exit style of header incorporates all of the famous exclusive features that Hardin marine headers are known for like large 2-1/4" big tube primaries a must in performance style race header.  These headers will accommodate nearly any engine configuration and exit style from top hatch race exit systems to dual and triple engine tail pipe configuration’s with the greatest of ease.  Big Tube headers are designed for high horsepower applications and deliver horsepower returns that are simply unmatched.  If your in the market for big tube power supply and or need unique fit, then look no further than these Tornado Big Tube Headers.

Tailpipes are available in 4 inch and 4-1/2 inch wet or dry style.  All tailpipes are built custom to order.  Please call for details.

Custom Tailpipe Installation Example

Big Tube 2-1/4" Big Block Chevy Freshwater Merc Kit 36" Wide - STOCK Measurements

THE ULTIMATE "FRESH WATER" EXHAUST SYSTEM

Finally an affordable alternative to all stainless steel water jacketed headers. For the thousands of pleasure boaters "NOT" affected by the corrosion problems associated with Salt Water there is at last the availability of a true tubular header system for the Fresh Water boater. These headers are designed to be a replacement for Mercury 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. Low Port Headers are also available for under the swim step applications. Standard width headers will have about 1/2" clearance between header and tall style Moroso valve cover. Headers come complete with bolts, gaskets, water fittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.

THE LIGHTNING CONSTRUCTION DIFFERENCE IS WHAT COUNTS !
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 corrosive water environments. Now able to apply the same high tech coating to the fresh water series of steel outer lined thus aiding in the prevention cracking and deterioration.

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

Below Swim Platform Low Port Exit Jacketed System - 454/502 Chevy Low Port Headers 36" Wide

These headers are designed to be a replacement for Mercury, OMC or jet manifolds whenthe exhaust ports are mounted low in the boat. For example, under the swim step or whenelbows are used with the stock manifolds. Headers will have about 1/2" clearance between headerand tall Moroso valve covers. Headers come complete with bolts, gaskets, water fittings, petcocks, 4" elbows for bottom, etc. (less 4" hose and 4" hose clamps). Factory oil filterrequires 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 yourengine. 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 theactual 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 exhaustgas 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 getsreduced 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 openingsconsider 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 upto 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 arethen mechanically etched by sand blasting and then assembled. Finally, a corrosion resistant silicone ceramic coating is applied to the interior of the header while theexterior 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.

NOTE: ALL LIGHTNING HEADERS ARE BUILT TO ORDER IN 4-6 WEEKS

Narrow Big Block Chevy Freshwater Merc Kit 33" Wide

THE ULTIMATE "FRESH WATER" EXHAUST SYSTEM

Finally an affordable alternative to all stainless steel water jacketed headers. For the thousands of pleasure boaters "NOT" affected by the corrosion problems associated with Salt Water there is at last the availability of a true tubular header system for the Fresh Water boater. These headers are designed to be a replacement for Mercury 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. Low Port Headers are also available for under the swim step applications. Standard width headers will have about 1/2" clearance between header and tall style Moroso valve cover. Headers come complete with bolts, gaskets, water fittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.

THE LIGHTNING CONSTRUCTION DIFFERENCE IS WHAT COUNTS !
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 corrosive water environments. Now able to apply the same high tech coating to the fresh water series of steel outer lined thus aiding in the prevention cracking and deterioration.

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

Big Block Chevy Freshwater Low Port Kit 33" Wide, 12" Drop

• Available in: Black or Silver Powder Coated
• Material: 316L Stainless Steel inner tube / Mild Steel outer tube
• Width: 33"
• Depth: 12"
• Included:
  • Bolts, Gaskets, Water fittings, Pet cocks, etc. (less 4" hose and 4" hose clamps)
• Replaces: Mercury, OMC or Jet manifolds

THE ULTIMATE "FRESH WATER" EXHAUST SYSTEM

Finally an affordable alternative to all stainless steel water jacketed headers. For the thousands of pleasure boaters "NOT" affected by the corrosion problems associated with Salt Water there is at last the availability of a true tubular header system for the Fresh Water boater. 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. Low Port Headers are also available for under the swim step applications. Standard width headers will have about 1/2" clearance between header and tall style Moroso valve cover. Headers come complete with bolts, gaskets, water fittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.

THE LIGHTNING CONSTRUCTION DIFFERENCE IS WHAT COUNTS !

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 corrosive water environments. Now able to apply the same high tech coating to the fresh water series of steel outer lined thus aiding in the prevention cracking and deterioration.

NOTE:ALL LIGHTNING HEADERS ARE BUILT TO ORDER IN 4-6 WEEKS