Originally Posted by andrey_gta
good luck on your quest. Just be aware on diminishing hp returns on $ spent.
1. headers options, ranked in approx cost hi to low
Supersprint, ARMAspeed, MMW, MXP, diy cut out cat
User mapleridge is also working of a new set
2. Exhaust- you will se gains if you remove the secondary catalytic converters. Other options are mostly for looks & sweet sound.
AA has one tune,used to be called stage 2
Othe companies are Eurocharged, OEtuning
They are all kinda equal for a car without the DISA manifold based on all dynos
quick question but will 2nd cat delete put my car at risk of failing a smog test in CA? Thanks!