I was wondering if someone knowledgeable could help me out with a question about exhaust systems.

If someone with a GS were to convert their exhaust system from a dual muffler system to a single one, like the supra's, would that be better overall for making power?

To be more clear, if you were to upgrade the stock exhaust system to something like 3in. piping from the cat on back and with a single barrel-style (like HKS or Blitz) muffler, would you still see gains equivalent to an aftermarket system that utilizes a dual muffler setup?

I can think of some reasons why they would do it, like less weight, but I'm more concerned if having a dual muffler setup would have better flow characteristics versus a single muffler setup like the supra's. I hope someone can explain this to me because I'm looking at the blue Questpower GS and some other Japanese Aristo's and I'm just wondering why they would do it.

Thanks.

 

I've never really looked at a GS300 / Supra engine exhaust manifold, but typically cars with dual exhausts are setup because the V-configuration (v8, v6) of the engine has exhaust headers off both sides... true dual exhaust allows for maximum flow.

Don't the Aristo's you looked at - and I'm assuming the Supra and GS3's inline six just have a single exhaust manifold?

 

Hey DaveGS4, good point. So I guess the real question is why does a GS300 come with a dual muffler system?

Would it be for looks, or does it actually produce better flow characteristics compared to the single muffler setup on the Supras with the wider pipe diameter?

 

Most cars with a dual set-up (STOCK) do not even need it. It is mostly designed for the reduction of sound. Power would not change in a dual set-up vs a single set. If you look under a 93-97 turbo supra you will find that the factory exhaust V's off and then comes back to exit out a single out let. This is done for again, sound reduction. Most aftermarket exhaust manufactures do away with this set up to go with a complete straight two pcs. system. Downside sound is louader. Hope this helps.