C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1990 exhaust options

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Old Jun 26, 2006 | 12:33 PM
  #1  
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Default 1990 exhaust options

13 hours of work on friends 90 Vette yesterday. All fluids, diff, trans, coolant, brake, power steering, rotors, pads.

Car is stock, 60K miles. Exhaust looks terrible underneath but mufflers and tips are good. What is a direct bolt on replacement? How can I get it cheap? Off the manifolds, there are two (cats or resonators) and then it goes into a center (cat or resonator)? I didn't spend too much time looking at it and didn't bother checking the service manual.

Maybe I could get a very cheap exhaust off someone and mess with it and then just bolt it in when all is ready?
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Old Jun 26, 2006 | 12:45 PM
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BADDUCK
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From: One day you're a Comet...the next day you're dust... Arkansas
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I have an 1989 coupe and have somewhat the same situation. My mufflers are good, but I would like to eliminate my pre-cats and replace my cat. The option I am looking at is the DynoMax front Y-pipe replacement that comes with a new single cat. and eliminates the two pre-cats. It is priced around $225 depending on the distributor. I first saw it at Ecklers.

Not real cheap but not expensive, and you keep your stock O2 sensor.
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Old Jun 27, 2006 | 01:56 PM
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That's a good alternative. Anyone with an OEM exhaust that they took off and placed in basement for 15 years?
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Old Jun 27, 2006 | 02:40 PM
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I'd also try the C4/Parts for sale.

Try the Want To Buy (WTB) and see what happens.

Likely hundreds of good muffler parts sitting in rafters.

My 90 has 84K on the factory originals and may start going door to door asking people if I can look in the attic for C4 Corvette parts. Will probably find some in about an hour. Better yet, I'll just hang around the muffler shop till one comes in.

Hope you find some parts.

dlmeyers 90 coupe zf6 speed shocks
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Old Jun 30, 2006 | 09:43 AM
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Are there really any cheap alternatives? I thought about taking another stock 1990 exhaust and cutting things out as a cheap alternative. Maybe putting in a x-pipe?

Now I hear about maybe using a LT1 exhaust instead. Does this just bolt right in place of mine?
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