Muffler shopping, looking for sound clips / sound advice I'm pulling the rearmount turbo from my TA to make it a DD. I'll have to buy a muffler & tailpipes among other things. My desire like some I've read here is to be quiet but not restrictive, and no droning at highway speeds- I had a Flowmaster on my truck & got rid of it for that reason. My setup is: A 383 with LT4 heads & intake, Hot cam, 52mm TB, 1.6 roller rockers, Mac mid-length headers, high flow aftermarket cat, and a 3" intermediate pipe. The pipe had a header flange to mount the turbo, so I can easily use a collector adapter to mount either a 3" or 2.5" inlet muffler and have no need for a catback system. I have a 3" adapter, so since I have a modded motor I'm leaning towards a 3" inlet muffler. I want to retain the stock look and am planning to pickup some stock exhaust tips, or something with a larger inlet that has the same appearance. This is also a budget build, I'm selling the other parts to pay for what I'm buying. The OEM replacement mufflers are 24" overall with a 19" case. Here's a stock LT1 exhaust sound clip I found: I've been doing some reading & searching on YouTube and so far have eliminated the following due to sound and/or cost/quality:
I'm leaning toward the Dynomax Super Turbo. I see it is a 2.5" in/out for #17739 (OEM sized case) and the larger one is 3" in/out #17670. The 17670 is a little wider at 26" & 22" (the case is fatter also) and shows as being for the LSx F-bodies but I'm sure it could be adapted. There is a third one #17786 that is 2.5" in and 2.25" out, 26" OA and 21" case. The 17739 is the best deal of the lot at a little over $60. Dynomax describes the ST as the quietest performance muffler they sell. This video has an LT1 Corvette with Super Turbo mufflers. I like the sound, but I know the system is different: Other options include:
The Walker stock replacement units:
The drawbacks I see to a full 3" in/out system are:
If I can find a sound clip of the Super turbo 17670 3" in/out this would be a help. |
You don't leave many options but I like Spintech. |
I'd say the best way to judge off sound is to hear the setups in person. Someone with a killer exhaust setup with a shitty quality camera/phone takes away a lot of choosing an great throaty exhaust. So hear them in person before spending $$$$. Good luck! |
Originally Posted by Vicious95Z28
(Post 19080405)
You don't leave many options but I like Spintech.
Originally Posted by SwampWS6
(Post 19080429)
I'd say the best way to judge off sound is to hear the setups in person. Someone with a killer exhaust setup with a shitty quality camera/phone takes away a lot of choosing an great throaty exhaust. So hear them in person before spending $$$$. Good luck! |
After doing a lot of shopping, it looks like I can score the 17670 3" I/O Super turbo, two stock 2.25" tailpipes, and 6 clamps @ Advance for about $101 thanks to a $10 coupon & 20% off plus 7% cashback (offsets the sales tax). It's rare when their prices beat those online, and factoring in returns are a lot easier I'll buy there. I found a couple of 3" x 2.25" reducers and 2.25" dual pencil exhaust tips for about $76, so I'm around $177 for all new parts. |
My phone isn't letting me upload my video but I have Spintech muffler and it is truly bad ass! YouTube it Spintech F-body. |
1 Attachment(s) As an update, I had no idea how difficult it would be to find a pair of 3" OD x 2.25" ID reducers. Walker/Dynomax doesn't make one, and the vendors that do apparently don't make many. The only parts house that carries them is O'Reilly, and while they only want $4.50 each, they want over $18 to ship them. I'm looking at buying some aluminum and making 3/8" wall bushings since the muffler is wider than stock. UPDATE I found a pair of 3" x 3/8" wall aluminum pipe sections (2.25" ID) on eBay that were 1.25" wide for $6. I cut a diagonal slot in each so they would seal the 2.25" pipe better and they are a good fit. UPDATE 2 Sound clip attached. I've only driven the car for a short period and with the window open, but I think the Dynomax 17670 is the best bang for the buck w/o being excessively loud. |
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