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Summit Exhaust System, fully welded mufflers
I took the plunge earlier this week. I bought their 3" aluminized header back dual system for my Nova:
http://www.summitracing.com/parts/SUM-680102 With the 10% off and the house brand discount it ran me only $200. Granted I wasn't expecting to get a polished Corsa for that amount, but the system looks worth every penny. Nice mandrel bends, nice tubing. Feedback on other sites is very positive. The mufflers themselves are definetly white box versions of some type of performance muffler (dynomax)? Either way, they should sound pretty decent considering that some of the flow gets a straight shot through: http://i39.photobucket.com/albums/e1...mitmuffler.jpg In a muffler test here's how they performed: The Mufflers MAKE MODEL Part No. COST SUMMIT Turbo 630125 $14.75 THRUSH Magnum Glasspack 24214 $16.50 THRUSH Boss Turbo 17718 $23.95 HOOKER Competition 21006 $25.95 DYNOMAX Super Turbo 17733 $28.50 DYNOMAX Race Magnum 24215 $31.95 HOOKER Super Competition 21106 $35.95 SUMMIT Fully Welded 630325 $38.69 FLOWTECH Afterburner 50322 $39.95 MUFFLER FLOW TEST MUFFLER Flow at 28-in H20 Hooker Competition 232.46 cfm Thrush Boss Turbo 297.36 cfm Hooker Super Competition 320.96 cfm Summit Turbo 331.16 cfm DynoMax Super Turbo 333.94 cfm Flowtech Afterburner 342.20 cfm Summit Fully Welded 343.38 cfm Thrush Magnum Glasspack 507.40 cfm DynoMax Race Magnum 528.64 cfm MUFFLER Idle dB WOT dB DynoMax Super Turbo 89 123 Summit Turbo 89 124 Thrush Boss Turbo 90 123 Hooker Super Competion 90 125 Hooker Competion 92 122 Flowtech Afterburner 92 124 Summit Fully Welded 92 125 Thrush Magnum Glasspack 92 128 DynoMax Race Magnum 94 133 DYNO TEST All mufflers were dyno-tested on a 355-cube SBC with 10.0:1 compression, Air Flow Research 190 aluminum heads, a CompCams 292 hyd. a Victor Jr. intake, a Holley 750-cfm double-pumper, and 1 5/8 Headman headers. MUFFLER HP TORQUE 2,500-6,000rpm Average Hooker Competition 397.4 381.1 286.8hp/351.9 lb-ft Thrush Boss Turbo 407.1 384.9 292.1 hp/357.5 lb-ft DynoMax Race Magnum 409.5 394.3 298.8 hp/366.9 lb-ft Flowtech Afterburner 409.7 391.2 294.8 hp/361.7 lb-ft Thrush Glasspack 409.5 389.8 297.7 hp/365.3 lb-ft Summit Turbo 411.5 386.3 291.5 hp/357.4 lb-ft DynoMax Super Turbo 412.7 387.2 292.6 hp/358.6 lb-ft Hooker Super Comp 413.8 387.2 292.8 hp/359.0 lb-ft Summit Fully Welded 415.4 390.7 295.6 hp/362.4 lb-ft I'll post up pics of the install when I get started. |
Wow, that sounds like an unreal deal
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I had the Summit 3" turbo mufflers on the SS396. They sounded great with a nice rumble but not too loud to talk in the car while on the highway with the windows open. It felt like the car picked up a lot of power going from the 2-1/4 to the 3" dual exhaust. I think the Summit mufflers are Dynomax.
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Yea, I just put a Dynomax Super-Turbo catback on my Cherokee, and the supplied muffler looks quite a bit like what you have pictured.
- Justin |
Update:
I haven't run the pipes all the way to the back yet, so there is a lot of resonance under the car. But it is very loud. Sounds almost exactly the same as an open exhaust with dynomax bullets. |
You heard my 396 with the normal Summit turbo mufflers and it had a nice rumble at idle but was not bad at all while cruising on the highway at speed. Tailpipes might make a big difference, but I thought the Summit mufflers were Dynomax blems so they should be similar. Don't judge without tailpipes though.
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wonder if it could fit under a 3rd gen with some work...
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I finally got it all on there. The tailpipes kill some of the in-cabin noise, and it's fairly mellow at idle. From 2500 RPM up it's loud. Loud enough to get the neighbors a quarter mile away to stop by to say hi. The only mod I had to do was shorten the passenger side pipe by 3". Probably due to header variances, but it was easy. Other than that it was a bolt on. |
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Bonzo once it stops being so cold out I'll blast your headers and get em back to you. |
So do we get any under chassis pics of the setup?
or any drive by vids? :) |
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I tried Summit headers and had fitment issues against the block on the one side, sent them back then the next set had the collector pointed at an odd angle, sent those back and the third set had fitment issues against the block. Ended up with Headman Headers and the first set went in perfect. Sometimes saving a few bucks works sometimes it costs you more in other ways.
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