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RB26 plenum size

iruvyouskyrine

By iruvyouskyrine,
in Engines & Forced Induction

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iruvyouskyrine Grand Master

iruvyouskyrine

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RB26 plenum size

Hey all,

I will be putting an RB26 plenum onto my RB20 and i am also wanting to use Wiggins couplings on my cooler piping. Was wondering if anyone knows the inlet size of the RB26 plenum?

Not the throttle body size but the actual opening on the mouth of the plenum itself. Piggaz i know you were using wiggins clamps so maybe you could remember? I assume it will be a 3" clamp used. Thanks

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Piggaz Grand Master

Piggaz

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14 minutes ago, iruvyouskyrine said:

Just looking back at your build thread and in the pics you used a 3" silicone on your plenum not a wiggins clamp. Did you end up going wiggins straight off the plenum?

I'm keeping the 3 inch silicone joiner there. I wasn't prepared to pull the plenum off to weld it. If it does come off or the engine comes out, I'll throw one on. The Nismo plenums are a little more tricky to do than the factory units.

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