sifoo alvin, yes apexi spiral does gives all around performance,i think this should be the two world combine into one..eg: short primary runners of the 4 pipes but the 4-1 design, unlike other 4-1 header which got long runners..ps: got any APP brakeline again? hehe
has anyone try the ultimate with ignition harness to their 20v?
has anyone try the ultimate with ignition harness to their 20v?



and i'm not rich and really can't afford...