Really big DownPipe

Discuss the RB20, RB25 and RB26 series engines.
BlockHead
Posts: 211
Joined: Tue Jan 07, 2003 1:05 pm

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Does anyone make a 3.5 inch downpipe??? I was wanting to know cuz I am pretty sure I am going to get the apexi GT spec exhaust. I know mandrel bent is best but what would be the difference between a 3 inch mandrel bent downpipe and a 3.5 inch (however else they do it) besides the size of pipe. Just looking for a little more knowledge. Thanks


Nismo_Freak
Posts: 11665
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 240SX

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The GT spec exhaust has about 2" of 3" pipe after the mouting flange. If your interested we could make you a 3.5" downpipe for the car outta stainless or mild steel.

FAST-DATSUN
Posts: 1019
Joined: Tue Oct 22, 2002 9:46 am
Contact:

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We make a 3.5" but not for the stock turbo. You would have to mod the exhaust housing to get that big and go /EXT waste gate...

Nismo_Freak
Posts: 11665
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 240SX

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OR... you can use a 3" pipe for the first inch or two and run 3.5" for the rest of it. Either way... TBH the 3" will flow enough unless your looking to upgrade to a huge turbo.

BlockHead
Posts: 211
Joined: Tue Jan 07, 2003 1:05 pm

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Thanks you guys for answering my question :-D


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