* Stainless Steel-Ceramic Coated Headers
* Stainless Steel Cross Pipe with High Flow Catalytic Convertors
These headers are built with 3/8" thick flanges at the cylinder head and V Band collectors for Maximum Power andoptimum ground clearance. The 4-2-1 tube design is made from 16 gauge Stainless Steel tubing for durability with 1-7/8" primaries, the merge into 2-1/8" secondaries and then 3" collectors for increased horsepower and torque throughout the power band.This is not the typical Tri Y type header that has been around for many years, but rather the state of the art exhaust design that is now being used in many forms of racing, including NASCAR. The design accommodates both automatic and manual transmissions.
The 4-2-1 design was developed using a state of the art Dyno Tester and allowed the JBA designers to take the 2006 development Z06 from stock rear wheel Horsepower of 377 to a tuned Rear Wheel Horsepower with the JBA 4-2-1 of 440, areal world increase of