63-1561 is the part # for the K&N I installed.
Haven't noticed a decrease in mpg nor a significant increase in mpg. 70% of my miles are city though. The response is noticeably quicker and the deeper sound is music to my ears.
Next week I'm going to do some sound recordings driving by the camera. I want to hear a before and after when the new exhaust ships out myself.
DiabloSport Trinity Custom 89 Octane Tune by Hemifever. Magnaflow Catback Exhaust #16869 & Y-Pipe #10778. K&N 63 Series CAI. Moe's Performance 87mm Ported TB.
Billstein 5100 front shocks @ 2.1".
Tinted windows. RhinoLiner. WeatherTech digital floor mats.
Allgig installed to RBZ & backup camera.
Debadged dealer emblems. Color-matched interior bezels, rain guards, tail lights & 3rd brake light, & front & rear emblems painted blue.
4" Zone Lift w/ 3" Rear Coils & Nitro Shocks.
35/12.5/20 Nitto M/T on MotoMetal 951.
Color-matched Bushwhacker Pocket Style Fender Flares.