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74 exhaust on a 77

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Old Mar 8, 2005 | 11:24 PM
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Default 74 exhaust on a 77

Has anyone used the 74 exhaust offered by Corvette Central on a 75-79 Vette, as they advertise? This is what I am thinking; I have 77 L88 4sp, I was going with Dynomax Cerama-Coat Headers, with the Dual 74 exhaust offered by CC (I do not need to worry about emission test.). CC duals has MagnaFlow hideaway mufflers. If it is practical I was going to install the setup myself. My hesitation is the MagnaFlows, originally I was going with Flowmasters 40s. But if I can bolt up the setup from CC without any customizing, then that might be the way to go. (I like doing the work myself, rather then taking it to a shop.)

Also; I am pretty much running stock everything else. What would be a better system 2" or 2 1/2?

What do you guys think?
If you want to lookup the parts: CC part #'s: 323376, 323638-Mag
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Old Mar 9, 2005 | 12:49 AM
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I thought I knew a lot about 77's, but never knew about that L-88 option.

In any case that system should bolt up with only minor tweaking. Go with 2.5 in. It even helps out my little L-48.
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Old Mar 9, 2005 | 11:00 AM
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Sorry about that L82 is what I have.
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Old Mar 9, 2005 | 11:28 AM
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Yep, it'll work all the way thru '79. Assuming, of course, that you don't have State inspectors looking under your car...
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Old Mar 9, 2005 | 12:14 PM
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I have the 2.5" pipes on my 77, with manifolds. The only problem is that your car has 2 holes in the trans cross member for the pipes to go through but only 1 side had a bracket to secure the pipe from the factory.
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Old Mar 9, 2005 | 12:37 PM
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what do you think of the magnaflows over the flowmaster 40's?
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Old Mar 9, 2005 | 01:28 PM
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You can get the 2 1/2" transmission exhaust brackets for duals from the vendors. I got mine from Paragon. Part# 1809 for manual transmision or turbo 350. Part# 2426 for Turbo 400. I just installled the 1809 part under my 78 turbo 350 this past weekend in place the bracket that only secured a single pipe on the passsenger side.

Dropped the vette off at the exhaust shop this morning to have them install my super turbos, high flow cats and connect it all with 2 1/2" pipe to my just installed dynomax headers.

Mike
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Old Mar 9, 2005 | 09:00 PM
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Would this setup work on my 80?
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Old Mar 9, 2005 | 09:18 PM
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Originally Posted by SLine78
You can get the 2 1/2" transmission exhaust brackets for duals from the vendors. I got mine from Paragon. Part# 1809 for manual transmision or turbo 350. Part# 2426 for Turbo 400. I just installled the 1809 part under my 78 turbo 350 this past weekend in place the bracket that only secured a single pipe on the passsenger side.

Dropped the vette off at the exhaust shop this morning to have them install my super turbos, high flow cats and connect it all with 2 1/2" pipe to my just installed dynomax headers.

Mike
Thanks for the tip, just bought the bracket..
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