Magnaflow muffler
08-08-2012, 09:00 PM
#1
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Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Magnaflow muffler
I have a 1986 trans am it originally had a 305 tpi before I took the motor out I went to a performance shop and had a muffler put in with rectangular tips the piping from muffler to cat is stock, I then replaced the engine with a '89 350 tpi and have slp headers with cat now the problem I have is the exhaust makes a funky noise when you get to like 5k and above to try and describe the noise is like a humming noise with metal why doesn't my magnaflow sound like the rest of the youtube videos with similar set ups I currently have posted for sale my cat back to go in a different brand of exhaust I like magnaflow but this us a disappointment to me
08-08-2012, 09:19 PM
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Car: 1990 Mazda B2600i Cab Plus L98 Swap
Engine: 5.7 TPI, LT1 cam, 24 lb. Inj.
Transmission: BowTie Overdrives Level 2 700R4
Axle/Gears: 3.909
Re: Magnaflow muffler
I have a Magnaflow (2-1/2") 2 in 2 out that I'm running.
I have no strange noises.
Maybe pull the muffler to check if something has come loose internally.
I have no strange noises.
Maybe pull the muffler to check if something has come loose internally.
08-08-2012, 09:39 PM
#3
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Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Magnaflow muffler
Thats what I'm thinking i know magnaflow has lifetime warranty maybe I should have returned for a new one
08-08-2012, 09:55 PM
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08-09-2012, 06:23 PM
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Car: 1990 Mazda B2600i Cab Plus L98 Swap
Engine: 5.7 TPI, LT1 cam, 24 lb. Inj.
Transmission: BowTie Overdrives Level 2 700R4
Axle/Gears: 3.909
Re: Magnaflow muffler
Is it possible something was dropped and fell into the exhaust during your engine swap?
10-31-2012, 12:18 AM
#12
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Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Magnaflow muffler
I found the issue is the rubber hangers on the rear and the one that's on the transmission are dry rotted and make it hang lose and is rubbing somewhere over the axle and thus making that wired noise i hear
10-31-2012, 08:34 PM
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Magnaflow muffler
Thanks for the up date and letting us know what the problem was.
