for car in sig

what is part number for random technology y-pipe for use with slp 1 3/4 headers and borla catback?

E740

Y524

Y525

is fitment direct replacement bolt on or is modification necessary?

TIA

EDIT:

FWIW


740 use with oem manifolds, e957 manifolds, e599, e67 and e34 headers, will not fit y527 headers

524 aluminized use with y527 headers, will not work with oem manifolds

525 stainless use with y527 headers, will not work with oem manifolds

 

I'm not sure of the part number, but if the SLP headers you are using bolt to the stock Y pipe, you can use the Random Tech Dual Cat Y pipe for stock manifolds in its place, which I *think* is 525. I am running such a pipe right now on my stock manifolds. The fitment is top notch, it feels like a quality piece, and I gained nearly 1.5mph with it.

 

ttt

for the weekend crowd!