pra4sun

I was out measuring for new mufflers. I removed one of the generic turbo mufflers and measured the end of the exhaust pipe, before it enters the muffler. I came up with 2.5 inches.

Now, I've gone and looked at all of the Super Turbo and Ultra Flo muffler sizes at Summit, and most all of them have a 2.5 inch inlet. Out of the hundreds of models, they have one that measures 2.75 inches. They have some 3" models, but I would think that would be too large. I tried to measure the inlet/outlet of the old muffler, but they are too rusty to be accurate.

Forgive me if this sounds like a silly question, but is 2.5" outlet exhaust a rarity? Or is my measurement off?

vetsvette2002

NO your measurement of 2.5" is spot on. It should be 2.5"

Unless you are after the ricer coffee fart can exhaust

Making it louder doesn't neccessarily mean faster. Are you using equal length headers tuned for the rpm where you will be wanting peak performance and running at constantly?

Don

pra4sun

No, I'm not looking for a fart can, just the nice deep growl of a V8.
I have the stock factory exhaust manifolds (not sure if they can be considered headers) with aftermarket straight-through 2.5" dual exhaust.

I've decided that the Dynomax Super Turbo mufflers will do the job, it's just that most of them have 2.5" inlets, the same size as the exhaust. My problem is finding a muffler that fits. Many years ago, I went to an auto parts store and bought some cheap generic turbo mufflers. I don't recall having much of a fit problem, and I don't remember flaring them out to make them fit. I just want to buy the correct size so the question is:

What mufflers are people using on 2.5" exhaust, and what is the correct inlet size?

Thanks.

FeedVaal

I see the source of your confusion. When the specs are called out at 2.5 inlet, it generally means the inlet has been flared to accept 2.5 pipe. It's not really 2.5.

vetsvette2002

USUALLY
the inlet is sized to the ID or in this case 2,5" ID (Inside Diameter), the Corvette muffler outlet would be sized as 2.0" OD (Outside Diameter).

If you have the resources and the time, get either the stainless steel or the aluminized pipes from Allen's, get the quality mufflers, and have a reputable shop fit and weld the system together on the vehicle. No leaks and perfect alignment.
Don