Exhaust

[Sidewinder]

I'm currently working on getting a Magnaflow muffler installed on my exhaust, and possibly even a full catback exhaust. I was just looking to get some opinions on what I should get. Would single exit exhaust give better performance? I have both single and dual exit exhausts that I can use (I know stock it won't change much, but I mean for the future). Eventually I will be getting a full performance exhaust.

To start with, I'm looking for something with good sound but gives the best performance. I don't know a lot about mufflers, so what is the difference between oval and round bodies? Should I go with their regular mufflers or their chambered? What size should I get?

http://www.magnaflow.com/02product/02muffler.asp

Lastly, I just wanted to get opinions on which tips to use.

http://www.magnaflow.com/02product/shopdisplaycategories02.asp?zone=main&id=281

I'm thinking either the Dual-DTM-Round or Rolled-Oval-Angle Cut.

What is the difference between double wall and single wall tips?

[IsaacHayes]

oval = traditional muffler. Round = fart cannon style = LOUD. Go with oval.

Dual isn't going to gain you anything in performance, just look better in the back having pipes on each side. It will weigh more....

Chambered gives you that flowmaster sound but flows less that mufflers that are straight through.

[Sidewinder]

Ah ok, I definitely want oval then with the straight through, want a nice deep sound to it. I think I'm going to stick with just the single exit, as it was suggested it will give me better performance which is what I'm going for in the end.

Thanks for the help as always Isaac! There will be more questions coming your way when I do my top swap

[Ray Hamilton]

Exhaust

I too am looking a new cat back with no cat. S10 Blazer, 3.2 (from 2. stage II cam from ARI and Holley 400 cfm with bored out manifold.
I'm leaning toward the "dynomax" at summit racing. I've read that it's quiet like stock at idle but opens up as far a sound goes a higher rpms. Is there a better choice for the money, $109?

[johnnymossville]

Dynomax Super Turbo mufflers are a straight through design even if they have offset inlet and outlets. The # of outlets (single or dual) does not affect the flow in the way that you are thinking. The Super Turbos are flow rated and you just need to pick the muffler with the proper flow for your application. Chck the following web site to make your selection:

http://www.dynomax.com/ecat/pdfs/Super_Turbo_pgs192-197.pdf

The picture at the top of the page shows you how the muffler is constructed. Scroll down through the page and you will see the different inlet/outlet combinations. The flow ratings are at the left side of the page. The last column on the left shows you the horsepower ratings for each muffler with single or dual exhaust applications. Just pick one that matches the horsepower that your engine is making and you will have a good muffler that doen't steal horsepower.

[IsaacHayes]

No, the Dynomax Ultraflo is straight through.

The Super turbo is an S shape inside. They are quieter and still flow well, but not as well as the Ultraflo. The ultraflo is louder and has more rumble.

[johnnymossville]

Yes Issac, I stand corrected. The you are correct on all counts. The Ultra Flow is louder, has more of a rumble, and is more expensive.

[Ray Hamilton]

Thanks for the replies.

[Azrael]

What is the difference between double wall and single wall tips?

Double-wall tips have a second layer for thermal insulation. Stainless will discolor from heat over time to yellowish-gold (or blue from intense heat) so the added layer slows this down. They also just look nicer in my opinion but can be fairly expensive.

[Arns85GT]

The Magnaflows have stainless steel mesh surrounded with rock wool, instead of the standard fiberglass which mats up over time. I used a Super Turbo for about 3 months and it does not flow nearly as well. Any chambered muffler that asks the gases to make a hard turn, slows down the air flow. It is just that simple. If you want quieter, the smaller size of pipe is a little quieter than the larger pipe. In terms of round vs. oval, very little difference at all with Magnaflows.

Arn