Hey Dudes, I noticed that a few people in here have 89 GTA's with Dual Cats. I have a 89 5.7 GTA, and when I got my exhaust system done, and I removed the cat, there was only one to remove. Why didn't I have dual cats?? Just curious.
Thanks
Mike

------------------
Check out My Car Pics http://albums.photo.epson.com/j/Albu...667&a=13599419

Gran Turismo Americano "The Ultimate Firebird"
Smokin 1989 GTA- Bone stock except for exhaust. (no catalytic-stainless pipe into Flowmaster 2 chamber) & AC Delco Rapid Fire Plugs

 

I dunno, I noticed that my '89 IROC doesn;t have 3.27's in it...and some do...damn.

Uh...could be because of the option package the car came with?

 

I don't know man, my car has the 3.27 gearing. Maybe the 5.0 cars had the dual cats.
Later
Mike

------------------
Check out My Car Pics http://albums.photo.epson.com/j/Albu...667&a=13599419

Gran Turismo Americano "The Ultimate Firebird"
Smokin 1989 GTA- Bone stock except for exhaust. (no catalytic-stainless pipe into Flowmaster 2 chamber) & AC Delco Rapid Fire Plugs

 

i also have an 89 GTA and i only have one cat. I think it was just part of the options packages because i know there are other 89 GTA 5.7L that have dual cats stock.

------------------
Later,
Vomex
'89 GTA 5.7L TPI

 

Do you guys have N10 on your RPO stickers?

------------------
92Z28
89GTA

 

I got all G92 options on my 89GTA .... not sure what triggered and what didn't but check your RPO's cause the previous owner could have been a moron and just replaced with what was easier not better.

------------------
1989 Trans Am GTA - Flame Red Metallic, L98 5.7L TPI, TH700-R4, T-Tops, 3.27, 9-bolt rear, dual cat
- K&N Air & Oil Filter
- Dynomax muffler

1992 Camaro RS - Hawaiian Orchid, LO3 5.0L TBI, T-5, T-Tops, 3.08, 10-bolt rear - Sold
- K&N Air & Oil Filter
- L69 Dual Snorkel

 

It was a option back in 89 for the dual cats RPO code N10, I think after 89 they all came with it from the factory. BTW mine has dual cats

------------------
89 T-Top GTA 350 5-speed (soon to be 6-speed)
(Jet hot coated)1 3/4 SLP headers,flowmaster force 2,no cat's,SLP cold air,MSD 6al,march pulleys,ported plenum,air foil,B&M ripper shifter,180 stat,alston SFC,spohn LCA relocation brackets,ES LCA and Panhard bushings,free mods.

0-60 5.2s
Track Time
60' 2.049
E.T. 14.14@96.7MPH (2270 FT)
13.76@99.4MPH corrected

 

Thanks guys, I guess it was just an option choice. I can't check my RPO sticker, because the damn thing is missing
Thanks for the info!

Mike

------------------
Check out My Car Pics http://albums.photo.epson.com/j/Albu...667&a=13599419

Gran Turismo Americano "The Ultimate Firebird"
Smokin 1989 GTA- Bone stock except for exhaust. (no catalytic-stainless pipe into Flowmaster 2 chamber) & AC Delco Rapid Fire Plugs

 

I know on my 89 GTA 305 speed;It cam with 3.45 9 bolt rear, 5500 redline tach, but no AL driveshaft or dualcats, so i think some of those things people say like all 5 speed IROCS and GTA's had the N10 opt. or 350s with 3.27 gears and 9 bolt are myths and some of us were unfortunate enough to not get the dual cats or AL driveshaft, but whatever, I have a AL driveshaft now($140 used, and a random tech cat(too much $$)