exactly

 

I have both but run the test pipe on the street.

 

Im currently running a TP and love the sound/performance difference. Im tryin to take out the polar bears one at a time .

 

What pink elephant?

 

I'm with Erik I support the HFC fully... and from what I hear, Mil.Spec makes a fine one.

 

I have the stock cat in, but changing to the Tanabe concept g blue testpipe/full tbe

 

espelier DP/exhaust + aspec ti test pipe

 

HFC! I went from the stock cat to the Ultimate Racing HFC and now unto the Mil.Spec HFC. Unless you are looking to get absolutely every last drop of hp out of your car you might as well get the HFC and do a little bit for the environment.

 

Megan resonated test to go on

 

i have a buschur HFC that i hollowed out for extra stealth

i also have a 100cell cat sitting in a box that i need to put in as soon as i get my welder back

 

Why do you all call it a test pipe? What is being tested?

 

if your worried about cel just get 2 spark plug foulers. i havnt had any problem so far with my test pipe on the road as far as cop wise.. plus its cheaper

 

I'm more worried about the pollutants

 

test pipe. much cheaper than a hfc and sounds better. you'll learn to be proud of the stink

 

The difference in WHP gain/loss depends on your setup. Maybe 10 whp with a lightly bolted on car. Much more on 35R +