CP Performance Boaters Shopping and Product Info Guide
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Lightning Water Jacketed Freshwater & Saltwater Headers
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
Click on the part number to check pricing or place an order.
Lightning Marine - Magnum Stainless Wet Header System |
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For those of you searching for a superb value in a long tube Stainless Steel header, this is it! The Magnum Stainless Steel header uses Mandrel bent 316L stainless steel on the interior and exterior tubes. The header is tig welded with a custom alloy welding rod to help prevent cracking. After assembly the entire header is stress relieved, annealed, and heat-treated to maximize its corrosive resistance. The standard finish is satin and polishing is available as an option. The system is sold with gaskets, bolts, and hardware. EFI applications require ECU reprogramming.
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Lightning Marine - Standard Jacketed Header |
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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, water fittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.
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Lightning Marine - Below Swim Platform Low Port Exit Jacketed System |
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These headers are designed to be a replacement for Mercury, OMC or jet manifolds when the exhaust ports are mounted low in the boat. For example, under the swim step or when elbows are used with the stock manifolds. Headers will have about 1/2" clearance between header and tall Moroso valve covers. Headers come complete with bolts, gaskets, water fittings, pet cocks, 4" elbows for bottom, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.
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Lightning Marine - Silent Choice Jacketed Header System |
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Our 40322, 40324 and 40326 headers incorporate the end of the header with the silent choice valve. The 40322 uses the air operated actuators from the Mercury valves. The 40324 and 40326 uses electric solenoids supplied to operate the valves. Headers will have about 1/2" clearance between header and tall Moroso valve covers. Headers come complete with bolts, gaskets, water fittings, pet cocks, exhaust valves, 5" hose and clamps (less 4" hose and 4" hose clamps). Note: you cannot operate HP engines at high rpm's with valve shut. Factory oil filter requires relocation. |
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Lightning Marine - Reduced Water Distribution Header |
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Reduced water helps reduce reversion by reducing exhaust stream water. Only enough water enters the exhaust to keep hoses, etc. cool. The remainder gets dumped overboard via a 3/4" fitting at the end of header. This is the only option that will help the silent choice system. Oil filter requires relocation. |
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Lightning Marine - Dry Tailpipe Header System |
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Dry stainless steel jacketed tailpipes eliminate reversion totally. 4-1/2" diameter tail pipe protrudes past transom approximately 6", jacketed. Can be designed to exit water prior to transom or at end of tip. Very, very loud. |
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Lightning Marine - Header Options |
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