Join Date: Sep 2005
Location: Orange County, CA
I've heard that the plastic allows more control over the manufacturing process, and the bends and thicknesses of the intake tube. As a result, they have seen differences in dyno tested results between metal and plastic.
I believe K&N posts dyno results on their website. I have seen plastic outperform metal by up to 2 hp for the intake on dyno results.
I do like the look of metal though. Not sure what I will go with. Probably plastic, given the potential for higher HP.
'06 Commander Ltd, 5.7L Hemi, QDII, Midnight Blue, Gibson Exhaust, Raingler Net, K&N FIPK, Remote Start, Optima Yellow, Skid plates & Tow Hooks, Rocky Road 2.25 Lift, New Rear DT Shocks, 265/70R17 REVO's, 6061-T6 Custom Wheel Adapters, 4xGuard Rock Rails/Steps
'05 Land Rover LR3 SE