i have an 84 TA with L69 4bbl. well the hooker website says the part # 2055 is for the 86-90 305-350. so will they still work on my car, and i'm getting these bcuz i've heard about many disfigurements that u yourself have to do IE: dent one of the tubes. and i really haven't heard much about hooker but many people have them so i'll get these. so any info is welcomed and needed also what it cost for the headers and to jet hot coat them?

 

the denting only really has to be done on LONG TUBES I think. I just ordered the 2055s the other day. Check out my post if you'd like some more information on them... it's right below this one. I'll let you know how the install goes. https://www.thirdgen.org/techbb2/sho...hreadid=188723

 

They won't hook directly to the rest of your stock LG4 exhaust, that's why they limit the application like they do.

That's a good thing, though. While you're at it, throw away the rest of the LG4 exhaust. Don't keep any of it (with the possible exception of a hanger or two). Get a high flow direct-fit cat and cat-back for the same '86-'90 TPI single-cat application, and your engine will be much, much happier. If you buy any new exhaust parts made specifically for an LG4, you're in for a cyber-slapping.

The only real issue with installing 2055's on an LG4 is the A.I.R. fitting on the driver's side faces the rear (as it is for TPI), instead of towards the front as it is on the LG4. Just requires a slight rerouting, that's all (which I still have left to do before my next emissions test in November). They also do not have the EFE valve on the passenger side, but that's no big deal.

 

i have an L69 (305 HO 4bbl), it has the 3in exhaust with a 4 bolt cat. and i'm goina to be getting a slip on high flow cat when i get my cat back.
am i right or wrong with the exhaust thing.

 

Oops, it must have been late.

The L69 is better than LG4, without a doubt. But, you're still better off getting the system I described. The L69 cat-back isn't so hot, either. Don't get a universal cat; what you'll spend getting it in there will be more than the difference for a direct-fit (assuming you get a new cat-back as well).

 

five7kid, i think the cat back i'm looking at is for a slip on cat and i think the y pipe from hooker is too, so should i get a direct fit high flow cat for an 86-90 TA.

 

yes

 

what year

 

'86-'90.

They're all the same.

The slip-fit part is the inlet - the y-pipe is made for that. The bolt-on part is the outlet - the same-application cat-back is made for that. Which makes the whole cat a direct fit for any '86-'90 TPI single-cat.

 

1.) These Hookers will work for a 91 LO3?

2.) Are there any modifications necessary (ie A/C bracket), or do they just slide in?

 

They just slide in. The hookers come with everything you need including spacers for the brackets. The only difference is the way the air tubes face, but that isn't a problem if you arent gonna run a smog pump.

 

Gunny, I thought you'd been around long enough to know that.

The headers fit the engine, they just don't fit the LO3 exhaust - a very good thing, it turns out. The AC bracket needs one leg cut off.

 

Yeah, I know. It's just that it irks me that everytime they say the headers are only for TPI, it's like us TBI guys are getting short changed with a smaller y-pipe and what not.

. . . and yes, I will be keeping my smog crap.

 

It was the factory that did that to you, not the header manufacturers.

Just upgrade the whole TBI system with TPI headers and the rest of the exhaust for the TPI-application.

 

Well I was referring to the aftermarket guys. Everytime you order something specifically for a TBI system, the cat-backs are all 2 1/2" and the headers always come with 2 1/2 " y-pipe. Bastards.

 

so the 86-90 cat is the same sizr and all as mine but instead of a 4 bolt is has a slip on for the headers side but still 4 bolt for the cat back side?

 

I wouldn't say it's the same size. Yours is 2-3/4" w/4-bolt flange. The TPI version is 3" slip-fit inlet with a 2-bolt outlet flange. The factory TPI outlet is 2-3/4", aftermarket outlets are 3".

 

ok five7kid, recap. i should order my cat-back for an 86-90 f-body and a caco high flow cat for the same years? right? also if anyone has a pic of what a 86-90 cat looks like that would help