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#1
08-31-2017, 05:38 PM
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NOS crosflow muffler
Found a NOS GM 495854 muffler . Please help ID. I know it's for a firebird, Date code is 12/ 78. I think it's a replacement for a SD?
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Drive it ! 69 Trans Am coupe 70 Trans Am 76 SE 455 hardtop 87 GTA 89 Turbo TA 02 CETA Convert |
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#2
09-01-2017, 01:36 PM
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Nice find !
As far as I know it was the 73 and 74 SD 455 motors that got the cross flow type out of all of the GM F body cars! It was also found that even with the factory crossflow set up that the SD lost near 90 hp @ 6000 rpm!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
09-01-2017, 02:51 PM
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Box part # refers to 73-4 Super Duty, Inside box must be SR replacement for 76?
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Drive it ! 69 Trans Am coupe 70 Trans Am 76 SE 455 hardtop 87 GTA 89 Turbo TA 02 CETA Convert |
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#4
09-07-2017, 12:04 PM
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Is that system 2-1/4"?
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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