5-16ISO - Motordyne 5/16" ISO Thermal Plenum Spacer
This stealth modification adds 11HP-13HP and reduces the effect of power robbing heat soak. The 5/16" plenum spacer is fully compatible with all stock and aftermarket strut bars.
The engine cover easily fits and never needs to be cut. With the engine cover and strut bar in place the engine bay looks completely stock.
