MagnaFlow vs Flowmaster vs Straight Pipes

[Kyle Childress]

The attached video is magnaflows with 2.5" exhaust with hooker comp headers. The sounds is pretty sweet, but a bit harsh when you hard on the throttle.

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Edit: link to video that works.

 

[Iowan]

Also, if you wanna switch mufflers easily, you can just use some exhaust clamps to hold em in until you find the one you like, or you can use some of the exhaust flanges like from the manifold collector to the pipes.

I've been looking around and I wondered if I use 2.5-inch pipe and use 3in mufflers will it have too much gap between the two?

 

[Iowan]

The attached video is magnaflows with 2.5" exhaust with hooker comp headers. The sounds is pretty sweet, but a bit harsh when you hard on the throttle.

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Edit: link to video that works.

Sounds really good! Makes me want to have another square.

 

[theblindchicken]

I've been looking around and I wondered if I use 2.5-inch pipe and use 3in mufflers will it have too much gap between the two?

If you use 2.5" pipe with mufflers that have a 3" inlet/outlet, you'll need to use adapters to step it to the correct size. I got my adapters at SummitRacing for stepping from 2" pipe to 2.5" in/out mufflers.

 

[Kyle Childress]

If you use 2.5" pipe with mufflers that have a 3" inlet/outlet, you'll need to use adapters to step it to the correct size. I got my adapters at SummitRacing for stepping from 2" pipe to 2.5" in/out mufflers.

You can get adapter or a good exhaust shop can flange them out to size as well, thats how mine are done. The mufflers are 3in in and out, the shop just spread the 2.5in until it filled the gap and welded it solid.

 

[Iowan]

Thanks guys

 

[4WDKC]

I've been looking around and I wondered if I use 2.5-inch pipe and use 3in mufflers will it have too much gap between the two?

There was an exhast article posted on this forum somewhere that actually said to do this to keep the flow up through mufflers and make it quieter than the 2.5 system/mufflers.

http://redirect.viglink.com/?format...evy-small-block-engine-guide-exhaust-systems/

 

[Kyle Childress]

Also, magnalfow are stainless, flowmasters are just black painted steel. Every flowmaster i have ever owned rusted out in less then 5 years. But im in KY and our winters while they arent bad, our road department are on top of it, usually putting stuff on the road before snow ever hits the ground. My magnaflows are about 4 years old and the stainless has stained and discolored but no rust.

 

[Iowan]

There was an exhast article posted on this forum somewhere that actually said to do this to keep the flow up through mufflers and make it quieter than the 2.5 system/mufflers.

http://redirect.viglink.com/?format=go&jsonp=vglnk_152848483078312&key=830fbd339bace60b0b1256212f47a8a0&libId=ji6ccdl301000bqy000DLjnyk3v7k&loc=http://www.gmsquarebody.com/threads/the-best-exhaust-article-ever-maybe.21416/&v=1&out=https://www.chevydiy.com/chevy-small-block-engine-guide-exhaust-systems/&ref=http://www.gmsquarebody.com/threads/the-best-exhaust-article-ever-maybe.21416/page-2&title=the best exhaust article EVER...maybe | GM Square Body - 1973 - 1987 GM Truck Forum&txt=https://www.chevydiy.com/chevy-small-block-engine-guide-exhaust-systems/

Interesting.

 

[Iowan]

Here is the temporarily finished product. My plan is to go headers/crossover (H-pipe)/Dual pipes with a quick change muffler system. Mufflers I will be using are Dynomax Race Bullets and Dynomax Super Turbos. Does anyone have ideas of what I can do for a quick change muffler system? I can use the cheap summit clamps and maybe speed up the process with an air impact but I am open to suggestions.

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[theblindchicken]

@Iowan

Looks good, i've thought of using the 3 bolt flanges like the connection between manifold/header and the exhaust piping for mufflers to allow for bolt in/out mufflers or straight pipes.

If you're planning to only test them out to see which one you like best, then clamps would work perfectly.

 

[Iowan]

@Iowan

Looks good, i've thought of using the 3 bolt flanges like the connection between manifold/header and the exhaust piping for mufflers to allow for bolt in/out mufflers or straight pipes.

If you're planning to only test them out to see which one you like best, then clamps would work perfectly.

I thought of that after posting I think it would work very well.

 

[bucket]

My C10 has had stainless band clamps holding the exhaust to the collectors for the last couple years. Just a butt connection, not even joined pipes. I wasn't sure how well it would work like that, but it has held up great and exhaust removal is very simple.

 

[Iowan]

My C10 has had stainless band clamps holding the exhaust to the collectors for the last couple years. Just a butt connection, not even joined pipes. I wasn't sure how well it would work like that, but it has held up great and exhaust removal is very simple.

What have you used for hangers?

 

[bucket]

What have you used for hangers?

Just a pair of universal hangers. They are held on by the muffler clamps and bolt to the frame crossmember.