thats what i had in mind... i want to change it to 4 2 1 as well...i did the the cat and the muffler so the headers is the only thing i have to do now... how much did ur friend have to pay? i got charged $550 for the stainless headers.. i didnt do it cos the shop said its use less...
does ur friend have to change the catalytic converters? or just use the factory one?