I just had a test pipe made today for my 99 gst. just curious on what kind of gains i might see.

 

You gain a lot of noise and you'll shoot fireballs out of your tail pipe. You may gain another 2-5hp compared to a highflow cat.
Do you have a turbo big enough to justify it though?

 

i agree with silver, your really not gonna see a whole lot more gain unless your running an upgraded turbo

 

im still running stock turbo. my cat was badly clogged and i did not want to spend 200 on a good high flow cat. so i just had them make me a test pipe for around 80. im not worried to much in the hp gains, what i am mainly wandering is how quickly the turbo will spool up.

 

You wont feel a difference. Your car might take a little longer to start though.

Why didnt you just gut the cat?

 

Good Point Sebba

The Resident ******* strike's Again

 

I gutted the cat on my 2G... Alas, no fireballs though...

 

Chinse people gut cats Sebba. Maybe thats why hes not effin chinese.

 

i probably will still gut the cat. I just wanted to run a testpipe and see how it does. also will help when i get bigger turbo.

 

I have a straight pipe welded onto my car, I seen having a cat as one more spot to have an exhaust leak. I don't shoot flames. My car starts perfectly and it is not loud at all. I would say its preferenceif you want a test pipe put one on if you want it to be a little quieter go with what sebba said and hollow out your cat.