Help, 77 exhuast pipes
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
Help, 77 exhuast pipes
I want to put in dual exhaust pipes. I already have new mufflers and tips. I need the pipes from the original exhaust manifolds to the muffler. I did find a hooker #16521 hkr system. But am not sure if this is what I need. Any help would be greatfull. Thanks.
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
I got a complete Volunteer Vette 2 1/2" system. It worked very well. I am sorry that I do not know where you can get just the pipes. Do your mufflers have any sort of piping on the inlet side? Our cars need a certain set up to clear the spare tire tub. mike...
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 787
From: Lebanon Township New Jersey
I got 2.5 inch, aluminized pipes several years back from Mid America. I ordered pipes for a 74 (my car is a 77) to get the full duals, no cat system. You will also need a new bracket to support the 2 pipes where they pass thru the trans crossmember. Mid America has that too. Not cheap but it works well.
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
I got 2.5 inch, aluminized pipes several years back from Mid America. I ordered pipes for a 74 (my car is a 77) to get the full duals, no cat system. You will also need a new bracket to support the 2 pipes where they pass thru the trans crossmember. Mid America has that too. Not cheap but it works well.
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 787
From: Lebanon Township New Jersey
The 74 pipes definitely fit a 77. The pipe to manifold connections are fastened by 3 studs on the manifold and a flange on the pipes. Those studs will probably break off when you try to remove the nuts. I took off the manifolds and replaced the studs. Later I switched to headers and got rid of the manifolds. The original donut is not ceramic. I think the pipes came with a new donut, non ceramic also.
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
My system is also listed for a '74. My car has two holes in trans. crossmember yours should too. Ck. transmission tailshaft extension area and see if you still have the exhaust hanger. The only other hanger is at tailpipe. I got away from the cat. and Y pipe also. mike...
Last edited by mds3013; Nov 10, 2010 at 09:05 PM.
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
Thanks!! Is there a diff. between the L-82 exhaust system and the reg base one? Other then mufflers.
Last edited by daanbc; Nov 10, 2010 at 08:56 PM.
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Melting Slicks
Joined: Jun 2009
Posts: 2,709
Likes: 3
From: Savannah GA
There are two pipe sizes available... I believe the L-88 system is shown in MDS's pics... a short length of 2 inch "lead" pipe at the manifolds which is joined to a 2.5 inch pipe from there back. L-48 cars had a straight 2 inch system all the way if memory serves.
Safety Car
Joined: Sep 2005
Posts: 4,062
Likes: 104
From: Southeast, Tennessee
St. Jude Donor '09 thru '26
take a look a the corvette central website under their exhaust system pages. they also have a wide variety of OEM type pipes and parts that will m ake the job eaier for you. they also are a supporting vendor here. just a suggestion, however if you decide to use them, call them and speak directly to someone who can tell you if they have the parts in stock or if they are on backorder so you will know what to expect as far as delivery.
Instructor
Joined: Jun 2010
Posts: 111
Likes: 2
From: Warren Ohio
I just changed my stock '79 to a dual system bought from Zip Corvette. Price was right and the pipes came with donuts and u-bolts.They have a crossmember bracket that works too and is half the price that Mid-America charges. I should have bought the 2 1/2" set because I wouldn't have needed adapters to use my '79 tail pipes and mufflers.
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
My mufflers are 2 1/2" also. In fact everything is 2 1/2" except from the exhaust manifold. It looks to be 2" then welded to 2 1/2". Andrew I will be waiting on your e-mail, thanks, Psychovette, I will look into that too. Thanks.
