DUAL CAT CATBACK ?
11-05-2012, 10:27 AM
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Car: 1989 formula
Engine: 350 l98
Transmission: 700R-4
Axle/Gears: 327
DUAL CAT CATBACK ?
I have 89 firebird l-98 with the dual cats all stock exhaust and was looking for a catback what is a good catback for the dual cat set up thanks.
Last edited by 89 350; 11-05-2012 at 11:26 AM.
11-06-2012, 06:56 AM
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Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: DUAL CAT CATBACK ?
I have a 3 inch magnaflow from the cats back. I like the sound, not too loud but when opened up screams.
Stock intermediate pipe is 2.75". I have heard that one of the biggest restrictions on these cars is the y-pipe after the converters.
Stock intermediate pipe is 2.75". I have heard that one of the biggest restrictions on these cars is the y-pipe after the converters.
11-06-2012, 01:41 PM
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Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: DUAL CAT CATBACK ?
I used the system that was made for the 4th gen cars. The intermediate pipe was fabricated to fit the third gen. I ended up buying the system used fairly inexpensively. However, I have seen the complete cat back system for third gens selling on ebay in the realm of $400.
11-07-2012, 08:51 AM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: DUAL CAT CATBACK ?
I like the magnaflow, except the huge ugly tips. Formulas need a more stock stealthy look.
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