676-18-1153 Interchanges/ReplacesGLMMalloryMercury Marine- 30-20464
- 30-49313
- 30-54215
- 30-63326
- 30-63326T
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676-18-1155 Additional Details:
- Fits: IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II
Interchanges/ReplacesGLMMalloryMercruiser Stern Drive- 30-17927
- 30-35914
- 30-88957
- 30-88957A1
- 30-88957T
Mercury Marine- 30-17927
- 30-35914
- 30-88957
- 30-88957A1
- 30-88957T
Mercury Race Outboard- 30-35914
- 30-88957
- 30-88957A1
- 30-88957T
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676-18-1158 Additional Details:
Interchanges/ReplacesChrysler/Force/US MarineGLMHonda OutboardJohnson/Evinrude OutboardMalloryMercruiser Stern DriveMercury MarineOMC Stern Drive
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676-18-1160 Additional Details:
- Fits: IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II (s/n 0K999999 & Below) (1964-1997)
Interchanges/ReplacesGLMMalloryMercruiser Stern Drive
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676-18-1156 Additional Details:
Interchanges/ReplacesChrysler/Force/US MarineGLMHonda OutboardMalloryMercruiser Stern DriveMercury Marine
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676-18-1157 Additional Details:
- For: Mercruiser Vazer
- Fits: 80, 90, I, IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II
Interchanges/ReplacesChrysler/Force/US MarineGLMHonda OutboardMalloryMercruiser Stern DriveMercury Marine
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This Part has options, please click the button below to order.
310-40 + Option(s) Standard 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.
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This Part has options, please click the button below to order.
310-40 + Option(s) Standard Jacketed Header - Big Block Chevy Jet Drive 36" Wide
These headers are designed to be a replacement for 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, water fittings, 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 330 hp 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 they are 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: LIGHTNING HEADERS HAVE A 4-6 WEEKS BUILD TIME.
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This Part has options, please click the button below to order.
310-40 + Option(s) 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
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This Part has options, please click the button below to order.
310-40 + Option(s) 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.
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This Part has options, please click the button below to order.
310-40 + Option(s) Big Block Chevy Freshwater Low Port Kit 33" Wide, 12" Drop
- Available in: Black or Silver Powder Coated
- Material: 316L stainless Steel
- 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
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676-18-1117 Additional Details:
- Fits: MR, Alpha One & Gen II
Interchanges/ReplacesChrysler/Force/US MarineGLMJohnson/Evinrude OutboardMalloryMercruiser Stern DriveMercury MarineOMC Stern Drive
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676-18-1161 Additional Details:
- Fits: IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II (except 1.32 ratio): also fits Vazer
Interchanges/ReplacesGLMJohnson/Evinrude OutboardMalloryMercruiser Stern DriveOMC Stern Drive
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676-18-1197 Additional Details:
- Fits: Alpha One Gen II (1996-97) (s/n 0F680000-0K999999)
- Fits: Mercury/Mariner 200 (3.0L DFI), 225 (3.0L Carb), 225/250 (3.0L EFI) S/N G437999 & Below
- I.D.: 1.5625
Interchanges/ReplacesGLMMalloryMercruiser Stern DriveMercury Marine
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676-18-1159 Interchanges/ReplacesGLMMalloryMercruiser Stern DriveMercury Marine
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676-18-1165 Additional Details:
- Fits: MC-I, R, MR, Alpha One, SS & Gen II (0F679999 & Below)
Interchanges/ReplacesGLMMalloryMercruiser Stern Drive
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676-18-1179 Additional Details:
- For: Gen II F6800000 & Up, Mercruiser Vazer
Interchanges/ReplacesGLMMalloryMercruiser Stern DriveMercury Marine
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676-18-1143 Additional Details:
- Fits: IA/IB/IC & EZ Shift, 120, 140, & 160, MR, Alpha One & Gen II (s/n 0K999999 & Below)
Interchanges/ReplacesGLMMalloryMercruiser Stern DriveMercury Marine
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676-18-1166 Interchanges/ReplacesGLMMalloryMercury Marine
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676-18-1193 Additional Details:
- Fits: Gen II (1998-UP), Mercruiser Vazer
Interchanges/ReplacesGLMMalloryMercruiser Stern DriveMercury Marine
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