The 1/4" spacer offers superior thermal insulation between the cylinder head and the intake plenum. This can be useful when plumbing custom intercooler piping or rotating the intake manifold. This is a Must have for anyone running an Aluminum Aftermarket intake manifold. Which Heats up the engine bay and intake temps quite fast. Withstands up to 500°F
Why it works: The concept behind the phenolic spacer is simple: isolate the heat produced by engine from the entire intake tract. This results in a cooler path for the intake air. This leads to lower and more stable intake air temperatures (IATs). Lower IATs mean you have the capability to make more power with your current set-up.
Twisted Tuning's phenolic spacers are engineered and manufactured by us. The spacer was designed using the OEM Head and Intake plenum to ensure perfect fitment. It was also designed to be used as a gasket and take the place of the common failure point of the OEM rubber gaskets which have been known and documented to melt or blow out under boost. The entire surface of the Phenolic spacer becomes the sealing surface. Not just 2.5mm of rubber o-ring.
To help with sealing we recommend the following be applied to the engine side of the spacer:
Each spacer is then CNC machined from a single piece of phenolic. We INCLUDE an option for longer studs if needed as well as an option to include a can of Ultra Copper.
Our studs (90mm Length) are made of SAE 4140 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. AISI/SAE 4140 grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength up to around 600º F (315º C.) It shows good overall combinations of strength, toughness, wear resistance and fatigue strength.
******NOTE: Ultra copper is readily available at your local parts store FYI, so you don't need to purchase through us. The 9oz can runs about $8******