I recently has a customer with this question. I like stainless steel because it looks better, but the customer had concerns about how it would disipate heat. I can't see it being that much worse than rubber though.. :o

Well if it was my GTO I would stick with the COMPOSITE intake manifolds, for one they are light as all get out, and they dissapate heat and flow pretty good. Especially if it is the F.A.S.T LSX intake manifold. But since mine has a Magna Charger :D I dont have to worry about a composite manifold.

I believe he's referring to the intake ductwork between the airbox and throttle body. I don't think the metal unit will hurt, as the air passing through does not spend enough time in the tubing for thermal transfer to occur. There is more potential for heat soak of the IAT(intake air temp sensor) so relocating it further away from the throttle body would be advisable. I'll be testing some different designs in the upcoming weeks, I'll post my results after testing is complete.

Silicone rubber as used in the LPE kit tends to resist heat. That kit also relocates the IAT sensor away from the radiator and hot engine to the new cold air box inside of the K&N filter. That alone should help the ECU get a more true reading of incomnig air temps and prevent it from retarding the ignition due to false intake temp readings.

Originally posted by CSiJason@Nov 25 2004, 01:40 PM
Silicone rubber as used in the LPE kit tends to resist heat. That kit also relocates the IAT sensor away from the radiator and hot engine to the new cold air box inside of the K&N filter. That alone should help the ECU get a more true reading of incomnig air temps and prevent it from retarding the ignition due to false intake temp readings.
Who carrys this? I want it.

Lingenfelter Performance