What are the common “bolt-on” mods?
The most common bolt-ons are CAI/RAI (cold air intake and ram air intake), exhaust, smaller upper pulley, larger lower crank pulley, ported blower, long tube headers, lowering springs, suspension mods, aftermarket wheels, and drag radials. These mods are typically enough to get the Cobra to around 445-475 RWHP and 475-500 RWTQ, and should be capable of propelling a good driver to low 11’s. Other more radical mods include twin-screw blowers (Whipple and Kenne Bell) and twin-turbos. Porting the Eaton has become very popular and can net you over 50rwhp. Stiegemeier Porting has been porting Eaton blowers since 2003.
