I've got a Borla Catback exhaust, and I was wondering about downpipe fitment issues. The Borla is kind of flared on the end that attaches to the midpipe cat. I was wondering, are there any downpipes that replace both cats that the Borla will attach too? Will I have to just replace the 2nd cat and keep the midpipe? I really want the Helix downpipe, but I'm worried about fitment. Any help would be very appreciated.
Thank you.

psycho

 

I dont think the Helix will fit perfectly w/ your Borla. The Borla uses a donut flange and the Helix uses a flat flange. I just installed a Helix down pipe on to my car which still has the stock cat-back. The stocker uses the same flange as the Borla. I tightened the bolts pretty tight but there is a very small leak where the two meet. Im pretty sure you will run into the same problem w/ your Borla. one solution would be to get a flat flange welded on to your Borla cat-back at a muffler shop.
heres a link to a thread that discussed the topic
https://www.i-club.com/forums/showth...ght=borla+hush
BTW, the Helix DP is pretty sweet. im really happy w/ it.

 

/me loves his helix up and down pipes


as far as it fitting the borla, i don't think it'll work that well, if at all
and i don't know much about other downpipes

 

I think the PDE Downpipe would work with the Borla. It has a donut type interface for use with the stock cat back.

FWIW I have the Borla Hush and will be using a HKS Downpipe which has a flat flange (like many other dps). All you need is a 3" 2-bolt flange and a short piece of 3" pipe to replace the flange portion of the Borla Hush. Any local exhaust shop would be able to weld up this new adapter to fit.

 

Thanks for the help guys. I think I'm gonna go with the Helix downpipe and just have a muffler shop weld a new flange onto my Borla cat-back.

psycho