I have access to an STi exhaust from the midpipe back as seen in attached photo. What is the probability that it will cooperate with my 91 Legacy? Already heard hangers are an issue and have access to some Kart Boy extended hangers.

 

Well - There's an aftermarket STi exhaust on the 91 Sport Sedan in my driveway. It's a full catless turbo-back though and the 91 is a turbo car as well....

 

But if the midpipe bolts up to the y-pipe on your legacy then I don't see why you couldn't get it to work. The STi exhaust on the SS runs right down the exhaust tunnel. The muffler is at the wrong angle and the lasy pipe section needs to be replaced with a straight pipe on mine, but it's not horrifically drastic.

 

You realize that the STi exhaust is WAY too big for a non-turbo EJ22 though right? You need *some* restriction for scavenging.

 

Personally I wouldn't bother as it's probably going to net you zilch in the performance department, and is going to need modification.

 

GD

I would think that the manifold/Y pipe would supply enough restriction for scavenging. Opening it up from the cat back should be a good thing.

Stock exhaust is rusted badly, and the STi exhaust is going to cost me nothing but time. Figured it would be worth a shot.

Can't lose for free. And Calebz is probably right. It's just overkill is all.

 

But if it's just *somthing* for exhaust you are after and not performance, then yeah - I say at least mock it up and see if it will go on.

 

GD

Can't lose for free. And Calebz is probably right. It's just overkill is all.

 

But if it's just *somthing* for exhaust you are after and not performance, then yeah - I say at least mock it up and see if it will go on.

 

GD

 

Thats the idea, Rick. I am not expecting too much performance out of a N/A EJ22. Will I get any boxer rumble out of it?

Thats the idea, Rick. I am not expecting too much performance out of a N/A EJ22. Will I get any boxer rumble out of it?

 

 

IMO, It should sound a bit rumbly

 

You should actually get the benefit if a couple more ponies out of it too.

You realize that the STi exhaust is WAY too big for a non-turbo EJ22 though right? You need *some* restriction for scavenging.

 

nice word:"Scavenging is the process of pushing exhausted gas-charge out of the cylinder and drawing in a fresh draught of air ready for the next cycle in automotive usage. This process is essential in having a smooth-running internal combustion engine. Modifying the exhaust system, (i.e. modifying the exhaust gas velocity by changing exhaust tube diameters) can detract from the "ideal" scavenging effects, and reduce fuel efficiency and power."