OK guys, ive done the search here, read a lot of threads and am confused, and im out of time.

I have an '85 Camaro with a crate 383 sbc motor. I need to replace the exhaust system, and as my title sez, I want LT headers, true dual exhaust, even if i have to drop her below the chassis. The car gets the new engine next week, so I would appreciate some direction, part numbers, etc.
thanks, Mark

 

We'd need to know what you plan on doing with the car, whether you have emissions inspection and/or testing, etc.

 

Duh! Sorry. Ok. Emissions not being installed, no EGR, AIR pump etc. Will do a cat(s) if necessary for fitment if needed. 375 HP expected. Will upgrade heads someday to make more. Edelbrock 750 carb. 90 percent street/ but do want some great torque. Thanks!

 

Hooker 2210s are the best LTs and then from there on, you might as well get a mufflex 3 or 4" cat back and Y pipe and be done. That is if you preffer to spend $ than fab stuff. For 1/2 the price you can buy pipe and make a decent system yourself.

Good luck, I am making a true dual that goes around my spohn memeber and is going to be all oval with oval mufflers.

A lot depends on how much $ you have.

 

mw66nova has the cleanest, least expensive, best ground clearance LT dual system I've seen on this board. It dumps before the axle, however. What he did would easily support a 375 HP 383.

 

Does he use mufflers? I'll go look it up...One idea would be to run the tail pipes out the sides behind the tires.

 

Do these 2210s shoot straight back? one thing i HATE about what ive seen is where the Y pipe meets just behind the lower rear of the engine.

 

yeah, these shoot 100 straight back. (2210)

 

ok , thanks. i checked em out on summitt, 400 bucks! i have hooker 2151-1s (coated) on my vette and they are nice, so im not saying they arent worth it, but....

 

Two, to be exact.

 

haha. That price is for non-coated too. The coated are 600+ lol. **** sux, but what can ya do

 

How about this...Hedman LT's, 2 1/2" S-extensions, Sumitt x-pipe kit, and 2 spintechs? All mandrel bends. Decent ground clearance. X-pipe located behind tailshaft of trans for clearance. That may not be the proper place for maximum performance, but that's where it would fit nicely. Racy and loud because it dumps at the axle.

 

very nice. Now a pic in the car would be great.

 

yeah, that's what im talking about!

 

I've got a poor pic or two. Right now I'm trying to modify this exhaust with 3 " s-pipes and 3" cut outs before the 2 1/2" x-pipe. You can see my dilema on Chicago and NW Indiana board.

 

From behind.

 

Pretty sure they don't make S pipes in oval, but maybe some heat and a bend someone could make one. I think I am going to go that route. Fully oval, with oval mufflers, but then at the rear point the exits tword the sides of the car, just to cut down on interior resonance. Then maybe someday do side tips peaking out. With set ups like this, if you have the $, I think it is worth the extra cost to go oval.

Either way, EXELENT JOB. I have hooker headers, so I don't think they make bolt up S pipes, but oh well, Time to fab fab fab.

 

What part number on those Hedmans?

 

Are those the headman extensions #18804 and summit x pipe kit #642125??

That looks exactly like what i should do with my system this winter.

 

I'm not sure of the part numbers, but yes. Those are Hedman s-extensions that are 2-1/2". You will of course need a pair. The Sumitt x-pipe kit is also 2-1/2" mandrel bent pipe. It's not that hard to fab up. At the time I did mine, I did't even have a welder. I just supported all the pipes up with rocks, blocks and sticks and whatever I could find. When the system was well supported and tucked up nicely, I marked each and every tube at where it needed to be welded. Then took the whole thing to work and tacked all the pieces together with the mig. I took it home to my rock driveway (no garage at the time) and trial fitted it. It needed some trimming and extending here and there. I made those simple alterations and then finish welded the whole thing together. Took 2 days because of running 28 miles back and forth to work each way to weld up, but if you have a garage with a welder, it shouldn't take that long! Don't weld as you go. Mock it all up on the car first. Mark all the pipes, then weld. Good luck!
Those Hedmans are 1-5/8 primaries long tubes. They may be fine for most people, but are too small for my engine.

 

How much Power you think u are putting out? I have a 500 HP 383 and hooker 2210s. The 1 3/4 coated long tubes. That is all I have and i need to make an exhaust. Wondering what you think i should run since you obviously have experience in this area. THX

 

It's up to you what you should run. I'm still gathering info on header design. I have gathered that 1-3/4" primaries are good to around 550 HP. This 2-1/2" exhaust worked great on my 520 HP 406, but theoretically may have restricted it a bit. Fitting full 3" piping is difficult, but I know it can be done because I've seen it before on this exhaust board! The reason I went with 2-1/2" mandrel pipe was because it was cheap and easy to do myself. I'm trying to modify it into 3" home made s-pipes with 3" cut outs. Behind the cut outs it will be reduced back down to 2-1/2" to match this system for street stealthiness. My restriction now is the headers. Yours should be fine. My motor is undergoing a drastic transformation from a 520 HP street thumper to a radical beast which will require larger primary tubes. Technically it probably takes a dual 3" exhaust to support 500+ HP, but I'll make due with what I have, besides, I love the sound!
Check out the exhaust picture collection here on the exhaust board for some fresh ideas. Some interesting designs on there. I like the one with dual 3" pipes going down the pass. side in stock location.

 

Cool thanks, It looks simple enough. Ill pick up those parts this winter and get it all together.

I think ill do the same as you and have it all under the car supported and ill just put a few tacks on each joint then pull it out and run a full bead.

 

here is a thread that i listed a full p/n list and prices...although, please double check as i know for a fact that hedman raised their prices about a month ago:

https://www.thirdgen.org/techbb2/sho...hreadid=299677

 

if you could shorten the middle part of the x-tension, it'd tuck up very nicely. ya know, the middle part of the "s"? you only need about an inch to clear the crossmember IIRC.

currently my hedman xtensions are the lowest point on my exhaust...

Brandon

 

i bought the Hedaman's from sumimit. took them to my mechanic who has pulled the engine to replace it with a 383....anyway, i also took him this pic, to show how to do it...thanks! Mark

 

good luck, can't wait to see it!