I just replaced the factory cat back exhaust with a HKS. I want to get the helix hi flow cat and the downpipe. I know the hks is 120mm but is it that too at the cat/exhaust connection. Thanks

 

The stock exhaust is 2.25in (i'm pretty sure). The tip on the hks muffler is probably 120mm not the actual exhaut piping.

 

I had a similar question.

Hope this helps.

Aug 30, 2004, 07:08 PM #9

--------------------------------------------------------------------------------

Quote:
Originally Posted by GreedMOTO
Is this a direct cat replacement? I have the HKS dp and Carbon TI. Will it bolt up/ line up?

Quote:
Originally Posted by GreedMOTO
Do I still need the O2 simulater to avoid the CEL?


Yes direct cat replacement. Will bolt up and line up fine w/ HKS DP and Carbon Ti. All the mounting hardwares and 3" gaskets are included.

No need for simulator. Will not throw a CEL>

Thanks!
__________________
Gruppe-S Engineering LLC.
29150 Simms Ct.
Hayward, CA 94544
510)783-5300
510)783-4300 fax

 

Stock is 60.5mm, 2.38 inches