I have a Helix 3 in downpipe (ver 2) and a megan racing catback, I'm wondering what highflow cats will bolt up to these? I need a real cat, not a resonator or a hollowed out cat(too much problems with the 5-0) I have been looking at some offerings from ultimate racing, anyone have experience with them? Any other suggestions?

 

WORKS has released the Exhale HFC which will bolt right in place of the OEM cat and give you the performance you're after while keeping emissions in check: http://www.worksevo.com/store/produc...roducts_id=119

 

Why not get the Helix high Flow Cat as it's made to meet the DP you've already got?

 

yea Helix would be my first choice... it should fit onto the megan cat-back... ask Gruppe-S about it

 

I saw the WORKS hi-flow at our local Evo meet along with other parts they make. Their hi-flow cat looks like OEM and is stealth whereas the Helix which I have is chrome and looks like a test pipe with a resonator. I love the Helix, but pricey.

 

I just tried mounting my catback exhaust on tonight to my stock cat. Bad idea. Wasted a few hours. One thing I did notice is that I need to get a bung welded in to the piping after the cat for the 02 sensor. Can I just use a helix test pipe and hook up my o2 sensor to it (since it already has a bung for it)?