LT1-LT4 Modifications 1993-97 Gen II Small Block V8

I'm so sick of these exhaust problems.. I've called jegs, summit, midas.. help!

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Old 04-10-2008, 11:48 AM
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Default I'm so sick of these exhaust problems.. I've called jegs, summit, midas.. help!

Ok guys I need help here.

I called summit/jegs and midas. I'm trying to connect my 2.5" exhaust to my 3" collector. sounds simple right? well i thought so too.. just go to autozone get a reducer NOPE. none there, none at murrays or advance either. I call MIDAS and they say they can make me some reducers but they won't have a flare like this one : http://www.jegs.com/photos/389R3025.jpg

all they can do is make me a typical reducer with no flare, like this one: http://www.speedwaymotors.com/eccSto...917-2530_R.jpg would one like this be okay ?



AND THEN! they (midas) told me i can't use a slip fit reducer (reducer slides over collector) because the collector material is to thin and might crush under the pressure of the U bolts i planned on using. Is this true? ... can I just use a regular non-flared reducer and use U bolts to clamp it over the collector ?


I can't use band clamps b/c my subframe is in the way
so what do i do? thanks guys!

Last edited by Pro_built7; 04-10-2008 at 11:57 AM.
Old 04-10-2008, 11:58 AM
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If you guys are confused let me know I'll try to explain it better, I REALLLYY need help on this so i can get my car running its just driving me crazy, I have no idea what reducer to use, what type of reducer i CAN use etc..

thanks alot guys.
Old 04-10-2008, 12:24 PM
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really the easiest thing to do would be to take it to a muffler shop.
Old 04-10-2008, 12:27 PM
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tell them to make the slip fit reducer and put it on. it wont crush the collector. just dont torque the U-bolt down super tight.
Old 04-10-2008, 12:56 PM
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Originally Posted by Badazz 97 TA
tell them to make the slip fit reducer and put it on. it wont crush the collector. just dont torque the U-bolt down super tight.
so what do you mean man just a typical reducer autozone style.. or a flared one,???? ( I don't really wanna spend 40$ on flared ones if possible).

I really just wanted to use a regular reducer (second pic^^^) and a u bolt and leave it at that you know.


let me know what you guys think!
Old 04-10-2008, 02:08 PM
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Originally Posted by Pro_built7
so what do you mean man just a typical reducer autozone style.. or a flared one,???? ( I don't really wanna spend 40$ on flared ones if possible).

I really just wanted to use a regular reducer (second pic^^^) and a u bolt and leave it at that you know.


let me know what you guys think!
yeah just like the one from autozone. i dont see what the problem would be. thats how a pacesetter y-pipe connects to the headers. it just slides on. most people use band clamps but you can use u-bolts also.
Old 04-10-2008, 02:27 PM
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Originally Posted by Badazz 97 TA
yeah just like the one from autozone. i dont see what the problem would be. thats how a pacesetter y-pipe connects to the headers. it just slides on. most people use band clamps but you can use u-bolts also.
ya but the problem is restriction, if you look at the typical AZ reducer it like "steps" down to 2.5" instead of being funneled down you know?

do you think that would cause flow issues or not really ?


do you know what im sayin man ?

Last edited by Pro_built7; 04-10-2008 at 02:34 PM.
Old 04-10-2008, 02:34 PM
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its gotta go down to that size anyway it wont cause that much restriction if any. you arent building a race car so if you loose some flow you wont notice it. there are plenty of guys making big power on 3 inch duals goin into single 3 inch.
Old 04-10-2008, 03:04 PM
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I believe that flowmaster has a set of reducers that slip on from 3" to 2.5". They have a nice smooth transition but are longer than standard reducers part #389-R3025. They are like $30 for the pair. I used them on my truck and worked nicely.
Old 04-10-2008, 03:12 PM
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Originally Posted by Pro_built7
do you think that would cause flow issues or not really ?
yes that would most definitely be a bottleneck. so did you not get the y-pipe with your headers? if so why not?

sounds like a good time for a universal 3" x-pipe kit from summit
Old 04-10-2008, 04:30 PM
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id just get the flared ones and have them welded. i know its underneath but it would look nicer too
Old 04-10-2008, 04:37 PM
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Old 04-10-2008, 06:17 PM
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Originally Posted by LT1MAN
yes that would most definitely be a bottleneck. so did you not get the y-pipe with your headers? if so why not?

sounds like a good time for a universal 3" x-pipe kit from summit
no i have the 2.5" flowtech universal x pipe kit w/cut outs from summit..

thats what im trying to connect ...
Old 04-10-2008, 06:18 PM
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Originally Posted by TXFORMULA
id just get the flared ones and have them welded. i know its underneath but it would look nicer too
ya that'd cost like 50$ as opposed to like 15$ LOL
Old 04-10-2008, 07:18 PM
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Old 04-10-2008, 08:19 PM
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take it to a exhaust shop, most have machines that will flare the ends of the 2.5in piping out to a lil over 3inch then band clamp those suckers on the headers
Old 04-10-2008, 08:53 PM
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Originally Posted by CamaroRacing12
take it to a exhaust shop, most have machines that will flare the ends of the 2.5in piping out to a lil over 3inch then band clamp those suckers on the headers
darn, idk why i didn't think of that, couldn't I just take the 2, 2.5" pipes from the kit and have them flared to 3" i.d. and then just clamp them on there? or is that a bad idea?
Old 04-10-2008, 08:59 PM
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Originally Posted by Pro_built7
darn, idk why i didn't think of that, couldn't I just take the 2, 2.5" pipes from the kit and have them flared to 3" i.d. and then just clamp them on there? or is that a bad idea?
haha thats what u have to do! its the easiest way... take ur exhaust to a exhaust shop, be like i have 3" collectors and i need these ends flared out just enough so i can slip them over the collectors and band clamp them on... they will take care of ya for like $20 - $50
Old 04-10-2008, 09:57 PM
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where can i get bandclamps? I'd rather use them than U bolts
Old 04-10-2008, 11:07 PM
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so anyone know where i can get lap joint band clamps ? (want to get this done 2m, dont really wanna order them)


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