Cyclone Low Exit System Header System For GM Big Block Bravo - Fully Polished

This Hardin Marine Cyclone system is designed around an application where an incorporated swim platform creates the need to exit the exhaust in a lower than standard location Through the use of a floating elbow positioning of the exit is somewhat maneuverable, these systems are perfect for limited access applications. Oil filter bracket, shift control bracket, and ECU bracket not included. Gaskets and bolts are included.

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 midrange 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

• 316L premium stainless steel construction.
• Cone shaped dual 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!
• Lid will withstand 100 PSI pressure spikes.
• Kit includes polished billet aluminum swirl lid cover!
• 1-1/4" NPT inlets and outlets.
• 3/4" NPT pressure relief port.
• 360 degree swivel mounting bracket for maximum mounting flexibility.
• Due to differences in mounting surfaces, hardware for mounting strainer not included.
• See Additional Info for extended product details.
• Find Replacement Parts Here

Gasket (5 per pack) replaces MerCruiser part # 27-805760

Used with Distributor Assembly – Thunderbolt IV & V

SHAFT Mercruiser 45-896332062.

CLAMP Mercruiser 54-896332067

O RING Mercruiser 25-32069

O RING Mercruiser 25-832062

O RING (Priced Each. Must be sold in quantities of 2) Mercruiser 25-32068

SEAL Mercruiser 26-896332064

SENDER Mercruiser 87-896332068

SENDER WATER-TEMP Mercruiser 87-896332066