Z31 / M30 Gutted Upper Intake (Plenum)

ASCO's original product offering, our Gutted Intake Plenums are built specifically for Nissan Z31 300ZX & Infiniti M30 (F31) enthusiasts that are looking for a high quality, gutted intake manifold configurable to your needs.

If your VG30 build will put you over 280+ horsepower, a gutted intake is a quick and painless upgrade that offers great bang-for-the-buck! Performance-wise, the plenums have been completely milled out, complete with properly radiused ports. This helps to provide a real boost in performance in mid and high RPM ranges, as well as ensures all cylinders receive equal airflow. The importance of proper port smoothing is critical, and it is a quality that we focus on doing right, every time.

Another prominent feature of a quality ASCO plenum is the ability to allow usage of your factory intake cover, allowing you to keep a closer-to-stock appearance than most gutted plenums. This is accomplished using a 13" by 6" machined top plate, complete with standoffs for intake plugs and plenum cover screws. Our plates are then expertly welded to the plenum housing, and the welds are guaranteed for as long as you own the intake.

Our upgraded gutted plenum comes standard with the above modifications, plus with your choice of available options. These options include:

• Throttle body opening port jobs
• Block-off plates/welding
• EGR Blockoff
• Coolant Elbow removal
• Pop-off Valve Blockoff

With this upgraded gutted plenum, any and all options above are available for one price. If you need a few of the above modifications done, no problem!

*Please Note - All gutted intake manifolds are subject to an additional $35.00 core charge at time of purchase. Core charge is refundable upon reciept of a Z31/M30 intake manifold in good condition. (Cannot have cracks or other physical damage, and must have a reasonably clean exterior.)