neil burkhead

I have a 87 vette that already has magna flow mufflers but still don't have the power sound I want sounds like oem. I want to straight pipe the exhaust and put on headers were is the oxygen sensor on it and if I don't half to pass emmision test can converter be removed what do I need to do to give it that deep monster sound

ch@0s

I used Headman Elites on my 91 and liked them., they are only $400. I was also able to get rid of the Precats in the y and use it to bolt straight into the main cat. You could cut the flange of your cat have a muffler shop weld it to a pipe and mate it to the y. you could keep the mufflers. I bet you would have the sound you are looking for.
Ck this out
Lots of pictures and a how to:
http://forums.corvetteforum.com/c4-t...te-videos.html

Video

Sandpiper59

Your cats, especially if original to the 87 are probably acting as very restrictive mufflers so yes, removing them will change the sound a lot.

You could punch out the center cat but the pre cats would be almost impossible to punch out..

neil burkhead

Thank u if I do cut out the main converter what do I do with my pipe from check valve and how many sensors are there in exhaust line

ch@0s

You can buy a block of plate for the tube coming from the manifold.

Sandpiper59

No sensors, you only have an O2 sensor but it's just down from the manifold on the drivers side, nothing else that the car will know about. A lot of guys will just fold over the end of that air tube, it doesn't do much, just supplies very low pressure air to the cat from the air pump. You can also just pull it out of the rubber hose at the engine and clamp a plug into the hose (a 1/2 copper plumbing cap fits perfect).

Greg

redvetttes

Can you remove the air pump?

Sandpiper59

Yes, but not without buying an expensive idler system to replace the pulley, you can't just use a shorter belt, it won't route properly without being held up at that point.

Greg

JackDidley

The air pump requires almost no power to run. I removed all the plumbing and left the pump in place.