This spacer kit is 1 inch thick to provide as much insulation as possible, while still having hood clearance. It is shipped with longer mounting bolts (5/16-24 X 3") because the spacer is much thicker than the stock gasket. Installation of this spacer is very straightforward, and is the same process as changing the stock gasket.
These 1" spacers will also add volume to your plenum, which will help increase torque throughout the power-band. Also the longer runners will help high-end power by straightening the airflow towards the cylinder at a farther distance from the valve, allowing it to gain momentum
We now also a 1/2" thick option also.
Insulating spacers have been around for decades and are proven to help, as they block some of the extreme heat generated by the engine from the intake plenum/supercharger/throttle body to help provide a cooler and more consistent air temperature, which results in better power.
Modern engines run extremely hot for emmissions reasons and can greatly benefit from spacers. All of our spacers are now made out of Garolite G-11 (for superior chemical resistance and heat resistance / insulation), so the color will be light green as shipped. Beware of cheaper spacers than may not withstand the extreme conditions under the hood of modern vehicles or block as much heat transfer.
Since this spacer can fit many combinations (vehicles, makes, and engines), please verify that there will not be any clearance problems arising from moving intake or throttle body out the thickness of the spacer. The best decrease in temperatures will come from using the thickest spacer that the vehicle can fit.
Some spacers may cause alignment issues of other items on or around the engine. Please ensure that this spacer will not cause any issues before purchasing.
We recommend buying an extra stock gasket from your local parts store, and sandwiching the spacer between two stock gaskets. RTV or equivalent sealant can also be used (especially on narrow, thin spacers).
If you need a spacer not shown on the site, contact us and we can quote it for you.
Standard shipping charges will apply to the rest of the world.