This Skunk2 Ultra Race Series side-feed plenum is the 3.5L-volume, 90mm-inlet upper plenum for the K-Series Ultra Race intake manifold, letting you set plenum volume and throttle-body inlet size for high-RPM and forced-induction K-series builds. Billet construction; pairs with the Ultra Race manifold base.
| Series | Ultra Race (modular plenum) |
| Volume / Inlet | 3.5L, 90mm inlet |
| Configuration | Side feed |
| Engine | K-Series |
| Part Number | 907-05-0070 |
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