350Z 5/16″ Basic Plenum Spacer

A flat spacer yielding the best overall gains, the Motordyne 5/16″ plenum spacer outperforms the competition while keeping your strut bar and engine cover in place. This stealth modification adds 11HP-13HP and is the simplest to install.

All Motordyne melt proof plenum spacers come with quality parts, pre-attached gaskets and self sealing plenum internal supports for OEM reliability.

(Due to Carb regulations this item is not sold/shipped to CA. – No International shipping) 



SKU MD-516"BZ Categories , Tag


Catalytic Converter/Downpipes/Spacers/Manifold Collectors. Longtube headers cannot be installed, sold, offered for sale, advertised, or shipped in California.


Weight 3 lbs
Dimensions 19 × 17 × 4 in