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Has anybody fitted the insulator spacer in-between the manifold and the air intake on a EF XR8, I was told that it keeps the air intake cooler so that it produces more horse power. At a cost of $220 it’s a bit of money to fit then find out that there is no difference. If anybody has before and after results could you please post them.
Thanking you in advance
Chris.
Thanking you in advance
Chris.