496 Mag/HO B/B Chevy 8.1 Liter Mercury 37" Wide Freshwater
Kit (Silver Finish)
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.
At last the easiest to install and most rewarding horsepower
upgrade is now available for your 496 MAG and 496 HO mercury engine. Starting
with the same superior production found in all lightning header Lightning has
constructed a water-jacketed header designed as a direct replacement for the
factory style 496-engine assemblies. Each header feature 2" id primary tubes
mated to an oversized 5’ inlet collector reduced to accept the 4" factory hose
connection. Simple incredible power gains have been achieved with just this
simple installation. Improved throttle response as well as fuel efficiency are
also a plus. Each system comes with the necessary accessory relocation hardware.
NOTE: Fuel pressure adjustments may be required.
50 To 60 Horsepower Gains have been reported with tubular header
installation on the 496.