the planetary gears inside the automatic transmission , while in nuetral the crankshaft spins the middle (sun gear) and the planetary gears are spinning so that the ring gear does not spin so theres no load on the engine but in drive there is
I want to upgrade from the stock exhaust and I dont know what I should get? I have about 300 bucks maybe 400
or maybe a CAI im not sure I do have a k&n air filter is it worth buying the kit?