where to mod the corolla header w/pics, 93-97 7afe corolla header mod Options

[Joe_1985]

ok ive seen a few members on here ask how to mod the corolla 7a header. For those of you that dont know the corolla 7afe header bolts up to the 6th gen st but the pipe where it bolts to the cat is a bit short, plus there is no 2nd o2 sensor, which will cause a cell.

my car is a 94 celica st 5speed coupe with fed emissions just for reference sake

the header i used is for a 93-97 7afe corolla with fed emissions, its made by alpha werks, bought from ebay, won the bid at 42 dollars shipped

heres the pics and explainations

most people ask, why mod a 7afe, well the header was cheaper than the manifold

manifold looked like this



long white marks are cracks, there are 5 of them

header bolted in




heres the distance from where the header would end to the after cat piping (where i cut the pipe on the header is right at the flange)



why did i remove the cat, well to fix it

broke cat



race prep cat



now your going to have to make a trip to the exaust shop after you bolted your newly made race cat in but before you go, do this

cut the section of pipe right after the flex pipe on your old stock assembly and take it with you



now when u get there the pipe will havta be remounted as the header downpipe will annoyingly clunk against the crossmember



also i had them cut and rotate the 2nd o2 bung and pipe then welded up





also now would be a good time to replace the 2nd o2 sensor and extend the wires, heres where my plug rests for 2nd o2




after that your pretty much done, so now i got a header 42 dollars, race cat, free, and the exaust work cost me 25 dollars. not bad

oh and i did copper coat the hell outta the gaskets they sent me, 8000 miles later they are still good.