can someone tell me how different is the 93-up cat back....
is the only diff thecat hook up or is the whole thing diff???

 

The '96 and '97 model years had dual cats which changed the connection slightly.

 

can i install a 4th gen exhaust in my 88 iroc? are the hangers the same? the route the same? i really like the magnaflow kit jegs #
642-15620.....how diff is the intermediate pipe?? can i just cut off the cat end and fab up a new connection??

 

Yes.

 

the hangers in the back are slightly diffrent.

pipes fit, but you need to redo the hangers.

 

You also need a 45* bent pipe to make the turn to point the intermediate pipe at the cat if you have a single cat car, dont need one if its a dual cat car.

 

but if you order exhaust for a single cat car and your car is currently a single cat car you are safe....minus the hangers of course?

 

No, see my previous post.

 

imo it takes custom work which is beyond the skills of most DIY'ers. If you're handy with a torch, then more power to ya, however for most people it's going to take a trip to the exhaust shop and a couple of bucks, in the end making them wish they had just bought one for a thirdgen.

 

I'll know buy tommorow night. I am doing that exact thing tommorow!

 

I just did this. I would hold off if I were you. pretty quiet. If you want I will make a sound clip for you.

I just ordered a spintech stainless muffler to replace the magnflow to try to wake it up a bit.


they way I did it was to eliminate the cat. bought a ball and socket joint from bassani. welded that to the header. then cut the i-pipe from the kit so I just need a striat shot to the ball and socket joint on the header.

of course you will have to mess with the hangers a bit. took about 3hrs so at a shop it would be around $150-$200 to get it done if you don't have a welder.

the kit is cheap though. $350 for 304 stainless exhaust. just a tad quiet for my taste and I have not cat and slp headers. I though it would be alot more agressive sounding.