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Looking for bolt on or weld on elbows for these L07 manifolds . Can’t find anything except bare flanges to bolt to these oval shape manifolds. No one wants to fabricate anything anymore .
The manifolds came off a C6 Corvette . I’m trying to install them on a 2003 LM4 5.3L
but I need some elbows with the O2 sensor holes . Does anyone make them ? Or have an extra set they would be willing to part with?
Is this a stupid idea ? We have stock manifolds and the engine does not run right with the big cam. Thanks
Get some Corvette headpipe stubs and sculpt at will....
A "big cam" (how big??) should really be running headers. There is no exhaust tuning with these or any manifolds.
Get some Corvette headpipe stubs and sculpt at will....
A "big cam" (how big??) should really be running headers. There is no exhaust tuning with these or any manifolds.
We inherited this motor in the car with stock exhaust manifolds and this Cam https://www.summitracing.com/parts/sum-8714r1
it has one O2 sensor hooked up to the Right side. The issue is the drivability sucks between shifting gears the engine hunts and pulls and jerks unless you get the rpm perfectly matched and accelerate into next gear . We are trying to get a tunner to tune this but we are told we need to open the exhaust up first. So these manifolds were suggested .
Which ECM are you using? If GM,it is supposed to use O2 sensors on both sides. If using one,it should be "seeing" all the exhaust, not just one side.
it is running crappy because it likely has the stock tune AND is only reading one side on the O2 sensors
Get some Corvette headpipe stubs and sculpt at will....
A "big cam" (how big??) should really be running headers. There is no exhaust tuning with these or any manifolds.
I can’t find any head pipe stubs do you know where I can find them?
Thanks
Due to the oval shape, you might have to roll your own.
It might actually be less hassle to get some headers that would fit. Plus you WILL gain power from them.
I can’t find any head pipe stubs do you know where I can find them?
Thanks
If you can manage to make these work in your vehicle fitment, with the center dump, you can find the OEM take-out exhaust over on Corvette Forum. Guys remove this setup for full length headers all the time, and I’d wager you won’t have a bit of problems finding what you want. This manifold actually flows pretty well if you can make it work.
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L07 Exhaust elbow help 
