The billet plenum fixes the three things wrong with the factory one: it's plastic, it cracks under boost, and it feeds the three cylinders unevenly.
Billet | O-ring sealed | Throttle body relocated | X3, all years
The factory plenum isn't just a restriction. It's where the uneven pressure that kills X3 head gaskets comes from. This one distributes evenly, seals properly, and takes boost the plastic never could.
This is a fully O-Ring sealed hurricane dispenser AKA intake plenum assembly. Instant bolt-on HP gainer. The throttle body bolts directly to the top of the plenum, placing it in a more logical and safe location, away from exploding belts and clutches. The OEM plenum is plastic, making it vulnerable to cracking under high boost levels. The OEM plenum also contributes to highly uneven charge pressure in the intake track amongst the 3 cylinders creating less power and more chance of blowing head gaskets on cylinders that receive the extra charge.
All orders are hand built once payment in full has been received. Typical ship times are 1-3 business days