Im wondering how good the helix high flow cat is compared to the test pipe. I know there is a difference but Im just wondering how good the helix hfc is.

Also how much louder would it be?

 

Should add 7-10 wheel compared to stock.lowers exhaust note a little.Im selling one for $150 shipped.Looks brand new.

 

Also do I need to get it reflashed if I were to go with a test pipe?

 

Well right now I have the high flow cat, thats why im wondering if its worth it to get the test pipe, where I live I dont have to pass emissions so thats not a problem.

 

Faster spool,more power.Stinks to high hell every time you stop,cant stand the smell.

 

A test pipe will always flow more than any high flow cats. However, we have seen good gains on the Helix HFC as its metallic design vs other ceramic. I would recommend a test pipe if you have no problem with the local emission and a Helix HFC if you can't stand the smell. The difference in whp should be around 7-10whp with a test pipe.

thanks,
Tom