Im looking to get some headers for my 91 RS with a 305 tbi. Im looking for some relatively cheap ones that are also good. Also they need to be able to work on a 350 if i ever get it. Thanks.

 

Check out the sticky at the top of the page. I recommend the Hooker 2055 super comp shorty headers.

 

Will those fit the 305 TBI and are those the only ones that come with a y pipe??? Also that price is kinda high for me, are there any other headers that are good and are cheaper. Im going to have a local exhaust shop put them on and where can i get a new y pipe?

 

yes they will fit a 305 tbi. There are plenty other headers out there that include a y pipe. Hedman, SLP, etc come to mind. I just mentioned the hooker because they are the best in my mind. If you are looking for strictly price the hedmans seem to be the best in that category.

 

Flowtech. Don't listen to the people who have never tried them before; only speculating based on their price.

 

I dont think people put down the flowtechs because of their price. I think it is more because of their dinky primary size and small y pipe. For the money though, they are good headers, but there are much better ones out there.

 

Yeah, like SLP's.

 

Small primaries isn't necessarily a bad thing when you're talking about headers for a tbi 305. SLP headers are great, but with the power levels you're going to get with the 305, I seriously doubt they are worth the extra money.

 

Check it out..https://www.thirdgen.org/techbb2/sho...hreadid=183362

 

I was quoted a price of $545 for the 2055s from jet-hot. Does that sound about right. Or would it be cheaper to buy heddman headers from jegs for 120 and get the 100 y pipe and then have them coated???

 

Tbi or tpi 305's will both be better off with 1 5/8 over 1 1/2 inch primaries. 1 1/2 is just too small for any v8. Besides, the y pipe is only like 2 1/4 inches. Thats crazy small. I believe someone here gained aroud 12 rwhp on the dyno with a stock 305 tbi just by swapping to the stock tpi manifolds and y pipe. There's really no sense in going that small with headers. If you're gonna do it, do it right. SLP's are good, but they dont fit for crap and are pricey. Hooker are probably even better and they are also cheaper. If you don't have the money right now I would save up to get the best instead of just buy cheap ones now.

 

Is that a good price for the hookers from jet-hot??

 

that's about average coated

 

Ok sorry to keep buggin you but will i need a different i pipe for the new headers to work? Im pretty sure im getting a 350 and the guy who is swapping for me can put the headers on. I need to know if i should get my flowmaster now and get that installed with the stock manifolds or wait and have the headers on first then get the flowmaster? I guess i need to know what i need to make the headers fit the stock exhaust or make the flowmaster fit the stock manifolds and then be connected to headers later on. I need to figure out the best way to do this. Thanks for all the help and sorry for being a pain.

 

the hookers have a 3 inch y pipe so you will need a 3 inch cat and 3 inch catback. Basically what you want is to buy all 86-90 tpi exhaust components and you will be set. I would install it all at the same time too.

 

But the only thing is that i wont be able to have the headers and exhaust put on at the same time. Is there anyway around this or does it all need to be done at the same time? Also cant an exhaust shop supply me with all the 3 in parts i need?

 

You don't have to do it all at the same time, but it would be easier that way. How come you can't?

 

Im not doing the engine swap next and the guy that is is going to put the headers on for me. The swap wont be for a month or two as well. I am also a little skeptical about putting the cat back on my 305 now because it burns oil pretty bad and smokes like hell. I dont know if this would damage the cat back or anything now if it was on. I was hoping to find a way to get the headers on then the cat back or vice versa. But i guess it wont work that way with the stock pipes uh?

 

The difference between .5" and .625" is fairly insignifcant; well maybe for a top fuel dragster or circle track racer. I'm pretty sure that's not one of the main duties that this 305 TBI is going to do.

No it's actually 2 1/2 inches.

What does dyno results for manifolds have to do with Flowtech headers?

 

 

I was quoted by my local performance shop for Flowtech headers (part: flt 11102) at $125. They said it would directly bolt the rest of my exhaust without a new y-pipe, but I read in the Summit magazine that I would need a new y-pipe for the same part. Do I? These headers will definately be fine for a slightly modded 305, correct?

 

It will be fine for your application, most likely, but there are better headers out there that will give better performance. The factory tpi stuff is bigger than the flowtech's so why go smaller? Doesn't make any sense.

 

A reply or two to this maybe?

 

you could do that, it won't damage yout catback.

 

Ok thanks alot for all the help, sorry for being a pain in the ***. But the car does smoke a fair amount after it has idled for a while and then i hit the gas. I hope you are right that it wont f-up the cat back.

 

Just do the 1 5/8 headers.... if your gonna have anything coated just getthe headers coated.... the rest will last for a while.

The 1 1/2 headers ARE signifigantly less than the 1 and 5/8..

thw 1/2" headers reach there limit around 275-300hp, the 1 5/8 need to be traded out around 375-400hp (this all assuming a 305-350) Any experiance engine guy will tell you those numbers. 1 1/2" headers were made for 28*ci engines.


If your worried about bottom end performance, the 1 5/8 edlebrocks i had on my car with a compucam 2030 produced a flat line from 2300 to 4500 on my 305

go with the 1 5/8. if you ever swap in a cam, or possibly a 350 (ya never know!) you will be much better off.

 

Just the valve seals.... it will only get worse, you can sorta bandaid it by running a sliughtly heavier weight oilduring the summer time...

 

Ok im going to get my cat back on this next week sometime but am not doing the headers now. What do i need to tell the exhaust shop to do so i can just hook the headers up later to the rest of the cat back? I need to know (since i am retarded when it comes to cars) how the 3 in exhaust will work with the stock stuff now and then work with the headers and new y pipe later.
Thanks again guys.

 

A little help on this last thing???