Decent Bottom mount Manifold

[newdude1]

What are some decent bottom mount manifolds that I wont have to worry about cracking on me? I wanna run a Gt28 on it.

And that doesnt cost an arm and a leg
Modified by newdude1 at 4:35 PM 8/29/2008

[Seishuku]

Stock cast iron manifold? It's not a pretty manifold, but it does the job pretty well. Cheap too.

[CSUPUEBLOTIM]

I think the Tomei is pretty reasonable and it included like everything you need.

[S14toRPS13]

Past threads on nICO points to Full Race or extrude honing the stock manifold.

[Neil]

fwiw i was running a Megan manifold for over a year without incident. I forget why but when I got my GT2871 I put my stock manifold back on. I think maybe i just assumed the megan would crack "any day now", but I kind of wish I had kept it on there. The exhaust note was deeper with it installed.

Megan, OBX, TarboXS, all the "name brand" cheap *** manifold are made by the same few companies in China. I'm sure the Tomei manifold is also licensed out to a cheap taiwanese manufacturer. I've read some threads about the tomei manifolds cracking, too. If the Tomei manifold had a support bracket like the Megan does then I'd consider picking one up because where the pipes collect seems to be a better design than the Megan, and I do miss the sound.

For the quality of craftsmanship and materials you probably can't beat FullRace, but that doesn't exactly fit the "not costing an arm and a leg" category.

edit: apparently the Tomei manifold DOES come with a support bracket. and they still crack?
Modified by Neil at 3:44 AM 8/30/2008

[Kalypso]

Stock cast iron manifold? It's not a pretty manifold, but it does the job pretty well. Cheap too.

[newdude1]

Whats involved in extruding and honing the stock manifold?

[Neil]

I think only a hand full of places extrude hone in the country, if not only one..

The process entails forcing a viscoelastic polymer + an abrasive either back and forth or one way through the passageways of the subject at up to 3000psi.

http://www.extrudehone.com

[supreamS14]

Looks like play-doe!

[newdude1]

well whats the stock manifold good till?

[Rosco]

Stock manifold will most likely outlast your turbo and motor. It's Iron. I've never heard of the stock manifold breaking either. I had an OBX manifold and I ended up taking it off and going back to the OEM one. I actually liked the OEM manifold exhaust note better. I could hear the turbo more clearly.

[Kalypso]

It will last forever, it absorbs heat better, and its simply your friend - focus on the turbo and SS lines. the stocker is fine

I actually liked the OEM manifold exhaust note better. I could hear the turbo more clearly.

[homeslicej2]

well whats the stock manifold good till?

Check out Codyace's build thread. He runs a GT2871 .64 at 22+ psi and 400+ whp. He had his stock exh. mani (redtop) extrude honed and swaincoated (heat coating) and it holds up fine. The stock mani is thick and built right for a bottom mount from the factory.