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
Fully O-ring sealed billet plenum — no plastic to crack under high boost
Throttle body bolts to the top, away from the belt a
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It looks amazing a little hard to fit but worth it
T
Tytus · September 25, 2026
Best in the biz (yep I’m obviously bias,) and its always a blast to pop in the shop and say hi to the guys!
Only bummed I couldn’t buy more parts!
Can’t wait to add some lightweight, good looking parts to a build that’s been long overdue! Super stoked for this plenum!