Cyclone "BIG GUN" System For GM Big Block - Fully Polished

At last the Biggest and the Best System available for the ultimate in performance These systems use an actual 4" internal pipe with a massive 4-1/2" outer shell These systems produce almost non-existent restriction to exhaust flow through the double wall water jacketed transom tail section These systems are referenced as dry tailpipe due to the fact exhaust flow never makes contact with the discharged water Each of these systems are designed for large cubic inch high horsepower and supercharged applications Additional transom sealing rings will need to be purchased separately When only the best will do Cyclone delivers Note: all Big Gun riser/tailpipes are custom built, a simple measurement guide is all that's needed to complete Allow 7-14 working days to build.

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 mid range 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 and gaskets making installation a snap.

Additional Information:

• Standard Mercury Exhaust Hole Locations
• How To Measure For Custom Tailpipes

Note:  Pricing indicated includes STANDARD DIMENSION Tailpipes only.  Custom Tailpipes may incur additional charges depending on the length and complexity of the tailpipe required.

• 316L premium stainless steel construction.
• Ultra-Deep screen basket provides even greater straining area.
• Basket is removable for easy cleaning.
• O-Ring sealed Lexan lid (not cheap plastic)
• Lid is removed by simple one hand grip knob. No wingnuts!
• Ultra Heavy Duty Cast Stainless Steel Clamp
• Lid will withstand 100 PSI pressure spikes.
• Kit includes polished billet aluminum swirl lid cover!
• Feature Billet Swirl lids.
• Stainless one-hand operation.
• Massive 1-1/2"NPT dual inlets/Outlets.

Cooling Jumper Hose, 1-1/4" I.D.

O-RING, WJ NOZZLE, YJ/WJ INSPECTION COVER

Retaining Nut replaces MerCruiser part # 11-812820-1

RING-LOCK Mercruiser 53-8320811.

Supersedes: 53-884661
53-832081
53-88466

CLAMP Mercruiser 54-896332084

SCREW Mercruiser 10-83208616

PLUG Mercruiser 19-883208

Supersedes: 19-881830

SPRING KIT Mercruiser 24-832085A1

Supersedes: 24-827634

Supercedes: 24-827634