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

3" collector to a 2.5" x pipe?

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Old 07-01-2008, 06:35 PM
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Default 3" collector to a 2.5" x pipe?

Messed up again so i found out i have a 3" collector on my headers and the rest of my set up is 2.5" like the x pipe and mufflers,how do i join the two at the collector?
Old 07-01-2008, 06:53 PM
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http://store.summitracing.com/partde...5&autoview=sku

One side is 3" (the side that has the 3 bolt flange) and the outlet is 2.5", either weld that end or get some band clamps. The kit comes with gaskets to go in between the collector and that reducer. Thats what I got to go from my 3" collector lt headers to my 2.5" bassani true duals. Just dont be a retard like me and order two of them, it has two reducers in the kit.
Old 07-01-2008, 07:20 PM
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The thing I dont get is how is the side that has the 3 bolt flange on the reducer gona connect with the 3" connector if the connector does not have a 3 bolt flange built in?Do i have to weld one on and then unite the two with bolts and nuts or what?
Old 07-01-2008, 09:06 PM
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the simple solution is bring ur exhaust setup to a small exhaust shop, have the ends widened to a lil over 3" and then band clamp them to the header collectors if not, do what was said in the previous post
Old 07-01-2008, 09:23 PM
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Originally Posted by meangreenformula
http://store.summitracing.com/partde...5&autoview=sku

One side is 3" (the side that has the 3 bolt flange) and the outlet is 2.5", either weld that end or get some band clamps. The kit comes with gaskets to go in between the collector and that reducer. Thats what I got to go from my 3" collector lt headers to my 2.5" bassani true duals. Just dont be a retard like me and order two of them, it has two reducers in the kit.
that's what I used, I just welded that to my exhaust and then welded 2 of those flanges on my headers. more pics here

Old 07-01-2008, 10:17 PM
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thanks for the help guys,nothing against any of the suggestions,but im gonna just take it to the shop and have the ends widened because i need the car running asap.(my daily driver)Plus summit takes about a week for them to ship
Old 07-01-2008, 10:46 PM
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Here's what you need. http://www.jegs.com/i/Flowmaster/389...744771%7C11535. I did the same thing. I bought my 2.5" x-pipe before I even realized that PS LT's have a 3" collector. So, I ordered the Fowmaster Venturi 3"-2.5" cone. It only took a couple days for it to get here, since they do same day shipping.
Old 07-01-2008, 10:47 PM
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Originally Posted by GLT1
thanks for the help guys,nothing against any of the suggestions,but im gonna just take it to the shop and have the ends widened because i need the car running asap.(my daily driver)Plus summit takes about a week for them to ship
I dunno what summit you order from but summit gets my parts here like 2 days max and there 2 states away.
Old 07-01-2008, 11:26 PM
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Originally Posted by tspence45
Here's what you need. http://www.jegs.com/i/Flowmaster/389...744771%7C11535. I did the same thing. I bought my 2.5" x-pipe before I even realized that PS LT's have a 3" collector. So, I ordered the Fowmaster Venturi 3"-2.5" cone. It only took a couple days for it to get here, since they do same day shipping.
WOW, thats is exactly what i think im gonna do,thanks bro,so did you ever find some good muflers for your exhaust? ill post a clip of mine when im done.
Old 07-01-2008, 11:41 PM
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Nope, still haven't found the mufflers yet. I'm still thinking about the Flowmaster 10 series eBay knock-offs. That way, if I don't like them, I'm only out about $50 for two. And if I like them, then I got some good mufflers for dirt cheap. lol. The mufflers and some O2 extensions are all I need for the install now, since the headers came today. I can't wait to get it all on and hear what it'll sound like. I'll have to post up some clips too.
Old 07-02-2008, 07:20 AM
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yea def get the ones tspence showed u, haha i never even knew they had those
Old 07-03-2008, 11:24 PM
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Originally Posted by tspence45
Here's what you need. http://www.jegs.com/i/Flowmaster/389...744771%7C11535. I did the same thing. I bought my 2.5" x-pipe before I even realized that PS LT's have a 3" collector. So, I ordered the Fowmaster Venturi 3"-2.5" cone. It only took a couple days for it to get here, since they do same day shipping.
Yeah, I didnt know that your headers didn't have a flange on them, sorry. Those will work.
Old 07-04-2008, 10:46 AM
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slip fit F T W!



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