have you seen all motor mikes intake mani for the 420? thing is sick with a 400 dollar price tag but definitely the best and only intake mani ive really seen... the intake runners are shorter and inlet is bored out for a 60mm tb. i believe the intake runners are ported and polished i'm not to sure, i was gonna go this route before i sold my dsm you should look it up on tuners and dyno proven by bulletdsm so you know your getting a quality a manifold and work is top notch... not junk like obx
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2gn/t
Current Mods:
E-bay Cold Air Intake Pipe, AEM Filter, X-Tune 4-1 Headers, Magnaflow Hi-Flow Converter (Gutted), Greddy Evo 2 Catback Exhaust, CI Motorsports EGR Block Off Kit, AF/X Underdrive Pulley, Prothane Front Mount, NOS 75 Shot Single Stage Fogger System *Needs to be Installed*