So now that I have an E316g it is probobly time to start thinking about a downpipe, I will probobly go with a downpipe + highflow cat, I was just wondering if you have a test pipe on your car and you have an issue with it, when you take it into the mechanic will they refuse to work on it?

 

yeah they could....

i would stick with a high flow cat. you would loose maybe at the most 2HPwith a high quality high flow cat back compared to running a test pipe.

or if you really want to run a test pipe and they have a problem...just keep a cat laying around and swap it out

 

why would a mechanic refuse to work on it. That is retarded. There is no reason for them to do that. Even a dealership wouldnt refuse the work and money. Maybe a warrenty but that wouldnt matter in that case

 

B/c in pa mechanics can get in trouble if a car had a test pipe installed. Also I think its a federal offense if a car eqipped w/ a cat doesnt have one could be fined big time.

 

my car has a test pipe but i live in idaho we dont have any emissions laws or anything they work on mine. no problems.

 

I have one on my gst, and ive never had problems with shops. Hell i even passed inspection with my testpipe on .

 

yea i know in mass its against the law to have a test pipe and there is a hefty fine for having it. But ive never known a shop to lets say turn dow replacing a clutch or something because of it

 

Okay dont bother with the high flow cat, they are a crock of ****.

As far as a normal cat goes, there is a dyno vid of a full EVO III 16g setup with a 3" exhaust w/ a cat, and a electric cutout. The car gained 50whp with the cutout..... so TJ your wrong.

 

Go with a test pipe and do the cat camo mod. Istall the heatshields around the test pipe and no one will know the difference.

 

You could also just gut your cat. (Not intended to **** of animal lovers lol.)