4 bolt Cat on 305 TPI
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Joined: Feb 2006
Posts: 49
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From: North carolina via LI New York
Car: 85 T/A
Engine: 305 TPI
Transmission: 700R
4 bolt Cat on 305 TPI
My 85 T/A has a 305 with TPI and a 4 bolt cat, is this correct? from everything I read a 4 bolt cat is on a carb engine or was GM just using what ever they had? The y pipe looks fairly large, is it a keeper?
Thanks,
Bill
Thanks,
Bill
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The '85 TPI cat itself was the same as the L69 - not a bad piece.
Overall, one of the better factory exhaust systems offered.
Overall, one of the better factory exhaust systems offered.
Last edited by five7kid; Oct 23, 2007 at 10:06 AM.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: 4 bolt Cat on 305 TPI
Considering the Y you would have had with the LG4, yes, it's a keeper. Note the difference in the following pic:
https://www.thirdgen.org/forums/atta...tion-ypipe.jpg
JamesC
https://www.thirdgen.org/forums/atta...tion-ypipe.jpg
JamesC
Thread Starter
Junior Member
iTrader: (2)
Joined: Feb 2006
Posts: 49
Likes: 0
From: North carolina via LI New York
Car: 85 T/A
Engine: 305 TPI
Transmission: 700R
Re: 4 bolt Cat on 305 TPI
Is it worth reusing with a set of headers or get the complete package of headers and y pipe?
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
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