TBIThrottle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.
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They still fit a 91 and 92. I have them on my car. You should look into a 3" cat and 3" catback at the same time. I just recently installed the 2055's and they make a big difference.
I have some ceramic coated 2055s that will be for sale at the end of the month. I have the y pipe and a catco performance cat and dynomax 3" cat back as well. Please keep me in mind
Hooker 2055's or Dyno Don headers are what you want. The Edelbrock units for these cars are pretty poor. They are slightly better than stock. They have small primaries, and stock tube diameters intended to mate to the stock cat-back. You will want to replace the ehxuast from the headers back with a 3" system designed for a TPI car. If you can only buy one section now I would opt for the cat-back and then go for the cat and headers later.
I have some ceramic coated 2055s that will be for sale at the end of the month. I have the y pipe and a catco performance cat and dynomax 3" cat back as well. Please keep me in mind
I am getting a magnaflow catback over the winter 16829 i believe it is, so I would get the headers installed the same time. Please keep me in mind when you sell the headers. I think I will stick to the Magnaflow exhaust but I may want the performance catalytic converter. Let me know a price, thanks.
they are listed for 86-90 because 91/92 the cat hanger is different.
the 2055 are really good headers, although a bit costly. be sure to get a good felpro or copper gaskets and stage8 or other locking bolts though.
a catco 9118 and some 3" catback and your exhaust side is as good as it gets on a thirdgen
__________________ '84 T/A HO 5speed, freshly rebuilt L69
'89 Formula, somewhat modded L03 and soon T56+3.73
do not confuse a lack of traction with an excess of torque
hmm *scratches head* a set of headers shouldn't have a whole lot to do with the hanger on the outlet side of the cat right? guess i got that wrong somewhere in my head. anyways, the cat hanger is different 91/92 which will matter if you get the 9118 catco just get a pre-91 cat hanger and be good.
but as for the 2055, i think it might say 86-90 because after that the VIN F TPI had dual-cats and the y-pipe wouldn't fit? not sure on that, but i know several guys with 91 or 92 cars have these installed so i'm sure you'll be fine.
here's a pic of a install of 2055 and the 9118 cat on a 91 305 TPI:
__________________ '84 T/A HO 5speed, freshly rebuilt L69
'89 Formula, somewhat modded L03 and soon T56+3.73
do not confuse a lack of traction with an excess of torque
I installed the 2055's about three months ago, along with a 3'' magnaflow cat, 3'' hooker maxflow muffler, and 3'' catback.
I did everything that I could do myself, I can't weld so I had to take it to an exhaust shop to have the muffler welded to a catback system.
The install of the headers was pretty difficult, depending on what you remove.
The passenger side manifold is difficult to remove (due to these "lock-tabs", if you will, placed over a couple of the bolts on the manifold) and the lack of room to work in.
It is also very difficult to drop the passenger side header into place, I did it from the top (removed A/C canister in order to gain more room) others have said they got it into place from the bottom by removing the starter but I figured I could do it from the top, although I had to remove the starter cable and wiring in order to drop it into place.
It is tough to do without scratching the finish of the header.
The driver's side manifold and header are both removed and installed literally without a problem.
Either way be ready for a good couple of hours of work, scratched and banged up hands, and frustration. I suggest getting someone to help, in retrospect I believe it would have made my job easier.
Those lock tabs are a royal pain to deal with. Some of them are not easy to reach at all much less bend out once you reach them. I used a small straight slot screwdriver to bend them out.
When doing this i had already installed an A/C delete pulley which helped on the passenger side. I still had to remove the starter and slide the header up from the bottom. It was a knuckle busting process for sure. I installed the headers, y-pipe and 3" Cat. I temporarily bolted the stock catback to the cat and drove it to a muffler shop to have them cut and install the 3" catback I had. It was a single piece catback so I either had to have it cut and welded or drop the rear. For $50 they cut and and welded it on. It was well worth it. If you have one of them 3 piece catbacks from hooker or flowmaster you could bolt that up in the driveway. I had a friend help which saved a bunch of time.
indeed, with AC it can be a bit difficult. you can lift the motor up on one side after loosing the motor mount bolt though. that will help a ton to get the pass side one in.
btw, be sure to open up the collector ball flange on the headers a bit which will ensure better flow! you can cut the flange back about 1/2 inch or some less, don't quote me on this measurement though. just do a mock-up and you will quickly find how much you can cut the flange down. also watch the torque you put to these collector flange bolts.
otherwise, as said, get good locking bolts and gaskets, otherwise you'll be back to the garage every week or so to retorque them which is a major PITA anyways.
