5/16" Basic
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.
5/16" Iso-Thermal
The Motordyne Iso Thermal plenum spacer adds 12HP-14HP and reduces the effect of power robbing heat soak by thermally isolating both the upper and lower plenum. Its 5/16″ thickness provides the best overall performance and is fully compatible with your engine cover and strut bar.
5/16" Copper Iso-Thermal
The Motordyne Copper Iso Thermal plenum spacer adds 12HP-14HP and reduces the effect of power robbing heat soak by thermally isolating both the upper and lower plenum. The 5/16″ thickness provides the best overall performance and is fully compatible with your engine cover and strut bar.
1/2" Basic
This stealth modification adds 12HP-14HP and is the simplest to install. This plenum spacer can be used for maximum performance enhancement. It also adds a substantially deeper growl under the hood. The 1/2″ plenum spacer is fully compatible with the engine cover but is too large to fit the stock strut bar. With the engine cover in place the engine bay looks completely stock with the only difference being the strut bar is not installed. All Motordyne melt proof plenum spacers come with pre-attached, high quality gaskets.
1/2" Iso-Thermal
This stealth modification adds 12HP-14HP and reduces the effect of power robbing heat soak. This plenum spacer can be used for maximum performance enhancement. It also adds a substantially deeper induction growl under the hood. The 1/2″ plenum spacer is fully compatible with the engine cover but is too large to fit the stock strut bar. With the engine cover in place the engine bay looks completely stock with the only difference being the strut bar is not installed.
1/2" Copper Iso-Thermal
1/2″ Iso Thermal plenum spacer (with all Iso Thermal components, Aramid Gasket and the Polarized Copper TB heater) This premium stealth modification adds 12HP-14HP and reduces the effect of power robbing heat soak. This plenum spacer can be used for maximum performance enhancement. It also adds a substantially deeper growl under the hood. The 1/2″ plenum spacer is fully compatible with the engine cover but is too large to fit the stock strut bar. With the engine cover in place the engine bay looks completely stock with the only difference being the strut bar is not installed. Use the copper if it ever snows in your area.
*All Motordyne Iso Thermal systems keep your upper and lower plenum cooler without the risk of throttle body freezing when driving in cold weather.