CHEVY BBC 454 CYLINDER HEAD KIT With COMP CAM 11-602-4 BIG MUTHA THUMPR 243/257

  
THIS IS A COMP CAM & ENGINETECH CAM KIT ASSEMBLED BY OUR EXPERT ENGINEERS TO CREATE THE HIGHEST QUALITY CAMSHAFT KIT AT AN AFFORDABLE PRICE. 1 COMP CAM 11-602-4 BIG MUTHA THUMPR 243/257 HYDRAULIC FLAT TAPPET CAMSHAFT. Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Big Block 396-454. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

RPM OPERATING RANGE: 2,300-6,200. DURATION AT 0.050:243/257. VALVE LIFT: 0.522"/0.507". 16 PREMIUM HIGH-PERFORMANCE ENGINETECH LIFTERS.

16 STAINLESS STEEL 1-PIECE SWIRL POLISHED VALVES: Intake Valves: 2.250. 16 HIGH-PERFORMANCE SPRINGS - Spring Diameter: 1.525. 16 7/16 SHOULDER ROCKER STUDS. 16 10 DEGREE CHROMOLY STEEL RETAINERS & HARDENED STEEL LOCKS. 16 VALVE SEALS & GUIDE PLATES.

This is the undisputed king of flat tappet attitude. The Competition Cams 11-602-4 Big Mutha Thumpr is designed for the Big Block Chevy (Mark IV 396-454) owner who wants absolute domination at the cruise-in and the drag strip. If you are building a Pro-Street Chevelle, a radical hot rod, or a 454 truck that needs to sound like a 9-second race car, this is the camshaft that delivers the earth-shaking idle and top-end power you are chasing. It is not for the faint of heart-it is for the builder who wants the loudest, roughest, and most powerful hydraulic flat tappet setup available.

The specifications of the 11-602-4 are massive. 050 of 243 intake and 257 exhaust, paired with a high-performance valve lift of. This huge duration profile keeps the valves open longer to feed your Big Block massive amounts of air and fuel at high RPMs. Unlike smaller cams that run out of breath, the Big Mutha Thumpr is just getting started at 3,000 RPM and pulls violently all the way to 6,200+ RPM.

It is designed to maximize the potential of aftermarket aluminum heads, single-plane intakes, and large-tube headers. What does it sound and feel like? The signature tight 107-degree Lobe Separation Angle (LSA) combined with the massive overlap creates an idle that shakes the fenders. It sounds incredibly "nasty, " with a deep, chopping rhythm that mimics a solid roller race engine. On the street, the driving feel is raw and aggressive. It creates very little engine vacuum, meaning you MUST run a high-stall torque converter (2,800+ RPM recommended) and deep rear-end gears (3.73-4.56) to get the vehicle moving. Once you are in the power band, however, the torque is relentless. Because you want the maximum "Wow Factor" for your dollar. You are getting a precision-ground Competition Cams component that offers the audio profile and top-end charge of a race cam, but with the maintenance-free reliability of a hydraulic lifter system. If you have the compression, the gears, and the converter to support it, this cam offers an experience that no other flat tappet can match. Install the Big Mutha Thumpr and guarantee that you are the loudest car on the block.