If your doing a big bore like the 440 kit your stupid if you don't port your engine. It allows for air to get in faster and it really wakens you 440 kit up. It can also be valuable on a stock machine, just won't make as big of a difference. Me and my friend have te same 440 kit, cam, etc. The difference his hasn't been ported because he's an idiot and I smoke him. Now he wants to get it ported and polished like mine.
2001 Duncan Racing National 440ex
Power Cylinder 4000 12:1 JE
web cam 463/9i, port & polish, 3 angle valve job, hardend rockers, titanium valve springs.
Duncan Racing Fat Boy 4 Exhaust
1mm oversized blackdiamond intake and exhaust valves
15 point gusseted frame powder coated candy apple red
Doug Eichner Signature Series Edelbrock Carb
Procom CDI ignition
Hinson Basket, Removable Side Case
Sparks 8 plate clutch
Custom graphics and seat cover
Custom air intake with K&n Filter
everything is polished and billet
Roll Design chrome swing arm
Elka dual rate ssd with LT linkage
TCS ZPS, douglas ultimate billet beadlock wheels with Maxxis Razr's
Roll +1.5" chrome anti vibe stem with Tag T-2 oversized bars cr hi bend
Herrmann arms Trail Tech HID Lights w/ custom billet mount (for the dunes)
Overized UM vented oil tank FST oil cooler kit and even more