I bought a used T1r testpipe and it did not came with gaskets, does
it req gaskets??
And where can I get one?

thanks

 

Yes you need that "triangular" gasket to ensure a good seal at the connection. You buy one where they sell the testpipe. It should have come with one.

 

Alright guess I'll buy one, Thanks X!

 

Looks like this thing:

 

Hey, XV, shady...

Can you clarify something for me? A test pipe comes directly off the exhaust manifold, right? A test pipe bypasses the catalytic converter, and goes straight into the exhaust system, right?

Why would you use one of these? Minimal horsepower gains and makes your car illegal for the street, right?

Just trying to understand. Tnx.

 

The testpipe replaces the catalytic converter that goes inbetween the catback exhaust system and the header. This is done to reduce exhaust backpreasure thereby increasing the flow and freeing up more horsepower. Yes, it violates federal law, but for some people the power gain is worth it (like me for example). It also makes the exhaust note more appealing IMO.

 

Chaz, a testpipe replaces the cat entirely. (Cat out, t.pipe in.) The premise is that even the little bit of backpressure that the cat represents, contributes to less exhaust flow. Removing that resistence, means more power. Our cars have a high flow cat already and resistence is minimal, so unless the cat is old and clogged to some extent, increase in power is minimal for NA operation. However, some like the increase in power and throttle response (as little as it may be). Some also like the way it changes the exhaust note.
I ran with a t.pipe for a little while but I hated the stink from the exhaust and put the cat back on. Even with a supercharged car, my butt dyno told me that the increase in performance was minimal. It did make the sound deeper, though. I can live without that. I hated the stink and the added black smoke when I got on it.
Here, and in most places, it's illegal to run without a cat. Fortunately here, we don't have annual inspections.

 

I see, guys. Thanks for the education. Interesting that the exhaust smell is different; I need to find someone with a test pipe just to smell this. I remember the switch from leaded to unleaded gas.... Uh oh, I'm dating myself. Used to love the smell of leaded exhaust. Probably took 5 years off my life!

Yeah, XV, I don't think we don't have yearlies here in Massachusetts either, although the inspection they do every other year is getting more and more restrictive.

Do you guys remove the air pump too for weight savings? No need to light up a catalytic converter if there isn't one, right? Do you have to change your electronic sensors to avoid confusing the ECU?

 

Not all NA cars with t.pipes stink. Mine stunk due to the extra exhaust volume of a supercharged application. Same with the black smoke. The smell is mainly sulfer that no longer gets trapped and converted by the cat. As for the black smoke, well, I guess all that just stays in my exhaust system, to one day clog the cat to the point where I'll have to replace it sooner than later.

I left my air pump in place, since like the cat-less set up, it throws a CEL. Therefore some other electronic measures must be taken to rid the light. Most who take the pump out either live with the light or go with another stand alone ECU.