ihave a 1989 gta trans am and i read an article and it said that all gtas came with the dual cat in 1989. my car has a single cat exhaust was something changed on my car? is this true about all gta L98s having dual cats? mine is a L98 and i did check the RPO codes.

 

N10 is the RPO for dual cats. does your sheet list that RPO?

 

nope their is no N10 code on mine.but even so i read the article and it said all 1989 gtas came with the 235hp dual cat setup? i would like to know why doesnt have it?

 

well if it didnt have the N10 RPO code it didnt come with the dual convertor setup. as for why, i dont know, i guess the original buyer didnt want to pay for this option......

 

i understand what your saying but the gta came with the dual cats it wasnt an option it was on all gtas i just read the mag article on this site and it ses if you bought the gta you got the dual cat 235hp with it.

 

just because it was in the article doesnt mean it was correct. it could be, but in your case it appears not to be. is you car a real GTA? maybe someone put GTA badges on your car?...just throwing out ideas here. maybe some GTAs had the single cat setup?....

 

no its a real gta u have the steering wheel stereo controls and some other things gta only came with.maybe someone changed the exhaust cant imagine why but i guess you never know? o yeah the rpo code and vin say its a real gta too.

 

hmmm...well then i would guess that not all GTAs came with the dual cat setup and unfortunately yours did not.

 

well dude i guess we cant have it all it is an awsome the car though gotta love it.

 

GTAs are very nice. i am not too knowledgeable about which models came with what stuff...ask on the history/restoration board for the scoop on what exhaust options the GTAs had.

 

89' GTA here, and mine was single cat. It was an option,which most GTA's did not get. Not all anything had dual cats. Just an option...the only one my car didn't have on it...

later, justin...

 

thanks for the info man its good to see im not the only one you know missery loves company lol. anyways thanks for helping me out good to see people helping not critisizing.i hope i spelled that right lol.

 

for model year 1989 only the Formula with the 350/auto or 305 TPI 5 speed got the dual cats. the GTA only got the single cat. it was the only year the Formula was rated 10 hp higher than a GTA.

 

really wow i can never figure out gm it doesnt make sense top of line gta and it only gets a single cat go figure well i guess i will have to fix that.

 

I have an 1989 GTA as well, and it's single cat....seems the norm to me!

 

i guess it is the norm. its nice that your getting such good times 14.7@91 my car has alot of bolt ons and im only running 15.3@93mph 7.1 0-60,but maybe thats because of my tires are in need of replacement i hope thats it anyway.

 

what bolt ons do you have?