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

4" exhuast

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Old Jul 1, 2010 | 01:30 AM
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Default 4" exhuast
Was just curious what you guys thought about this. Im soon going to take my spiral flow off for something new its kinda getting old. I was thinking get a 4" merge and getting a 4" bullet. So what do you guys think about this? Will it have any power gains? Pros and cons please?
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Old Jul 1, 2010 | 03:11 AM
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do it... Probably won't see any hp out of it, but it'll be great when you put a serious motor in it. Cons... it's a huge pipe man, lol a little harder to work around the driveshaft/rearend. If you want it over the axle, it's possible without PHB relocation, but your exhaust guy will hate you.
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Old Jul 1, 2010 | 06:51 AM
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My daily driver. My 94 Z28 is my daily driver, I have had this exhaust setup for over a year now, its great, awesome ground clearance, it just sounds awesome.
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Old Jul 1, 2010 | 11:44 AM
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Originally Posted by Wicked94Z
do it... Probably won't see any hp out of it, but it'll be great when you put a serious motor in it. Cons... it's a huge pipe man, lol a little harder to work around the driveshaft/rearend. If you want it over the axle, it's possible without PHB relocation, but your exhaust guy will hate you.
Well thats enough for me. It will be dumped before the axle so im not worried about that.
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Old Jul 1, 2010 | 11:58 AM
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Do it

What merge will you go with?

What headers/y pipe do you have currently?
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Old Jul 1, 2010 | 12:03 PM
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Originally Posted by SPRAYED Z
Do it

What merge will you go with?

What headers/y pipe do you have currently?
I have Ps longtubes and 3" ory.
I dont know about the merge yet?
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Old Jul 1, 2010 | 12:25 PM
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can i have your old spiral flow? Mine suddenly started coming apart inside, so now it buzzes like crazy and is almost unbearable.
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Old Jul 1, 2010 | 02:06 PM
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Originally Posted by 93TAJ.C.
can i have your old spiral flow? Mine suddenly started coming apart inside, so now it buzzes like crazy and is almost unbearable.
sorry, im going to put it on my brothers z28.
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Old Jul 1, 2010 | 03:58 PM
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I used the flowmaster merge. Pretty nice piece.
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Old Jul 1, 2010 | 07:21 PM
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Originally Posted by camar0corey
I used the flowmaster merge. Pretty nice piece.
do yo have the part number on the merge? And did you go directly off the y pipe or what?
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Old Jul 1, 2010 | 07:22 PM
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I've got a 4" on my Z28. Clearance isn't very good because the car is lowered...had a skid plate welded on the bottom of the drivers side. I need to re adjust the height. Gotta agree with wicked94z...its pretty damn big.
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Old Jul 1, 2010 | 07:25 PM
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I changed from true duals to a single 4 inch flowmaster merge and a 4 inch single chamber. Here's my thread:

https://ls1tech.com/forums/multimedi...pics-vids.html
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Old Jul 1, 2010 | 08:57 PM
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Ok, what about using a reducer in reverse. This way i wont have to hack up my y pipe in case i decide to go back. Will this work?
http://www.jegs.com/i/Hooker-Headers...oductId=744791
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Old Jul 2, 2010 | 05:06 AM
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there's 10+ hp in a good 3" y pipe with a flowmaster merge.
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Old Jul 2, 2010 | 09:27 AM
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Originally Posted by Wicked94Z
there's 10+ hp in a good 3" y pipe with a flowmaster merge.
Flowmaster merge it is.
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Old Jul 2, 2010 | 10:10 AM
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I too went from a TD set-up to a single 4", with a Dynomax race muffler, dumped before the axle. Great sound, less weight.
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