Isis V3 Turbo Manifold (SCH40) "Review"

[cbh148]

Originally Posted by Gar9854

Why do people keep wasting money on after market replacement manifolds? Stock manifold extrude honed has been proven time and time again.

Well my SR came with a Megan manifold and not a stock unit. But regardless, I just can't stand the sound of a stock manifold. It's too low pitched, basically in the same category as a KA. I'd gladly sacrifice 15 hp for the sound I want because it's a street car, and it's my car. Although the FullRace manifolds seem to be proven winners.

Actually got a call today from BuiltToWin that they're gonna build me a top mount manifold for my GT2871R instead of a bottom mount. They said they'd make a custom hot pipe and intake pipe at no extra charge, and that my Kinugawa turbo lines are long enough to reach up to top mount height. Pretty excited as I've never had a top mount before, but they look cool and seem like they'd be far easier to work on for most tasks.

[jr_ss]

Originally Posted by cbh148

Because the Tomei's seem to be just as bad as all the Taiwanese manifolds. They crack and they're made out of the typical thin mandrel bent 304 stainless steel rather than the beefy schedule 40 WeldEl piping that the Isis V3 is made of. Seems like pretty good incentive to try it to me (although, like mentioned in the original post, I'm having a custom manifold built at BuiltToWin.)

Tomei's are hardly as notorious for cracking as these cheap manifolds are. Do they crack? Absolutely. However, they are far superior in quality than the knock off shit. Not to mention they have a no hassle warranty.

Most of the cracking occurs from lack of running a support brace, which a lot of these manifolds come with. Ultimately, any thin walled manifold not supported correctly and exposed to high heat and long periods of it, will crack. There really is no way around it, unless you pony up and purchase an HD manifold, such as one made with Sch40 pipe and purged correctly, for 3-4x the price.

When it comes down to brass tacks, I'd buy a Tomei manifold over junk any day of the week, knowing I could send it back and get a replacement free of charge.

[ixfxi]

Originally Posted by Enjuku Racing

For the money the ISIS products are great.

"Today, Starbucks offers premium quality coffee at affordable prices."

- No 2

[Matej]

Just buy a six-pack of Megan manifolds at Costco.

[ixfxi]

whats the difference between megans and isisis

its like starbucks and coffee bean

[dillyumpshous]

Shitty welds... My v2 cracked on mines and the welds look a lot better then yours. Mine cracked because my exhaust is scraping to much and cause to much stress to the elbow and manifold. My real greddy elbow cracked to. All this can be avoided. Tuck your exhaust up and brace it good.

I'm now using a stock manifold.