The charger I have Is a 75mm (3 in) clipped to 2.6. I'm building this engine for 2.6, but honestly il have nothing on these 2.6 guys around here. Who knows might make it a ws or 2.5 truck someday with a turbo change. But any who rules have nothing against a runner intake in any class that I know of. Turbo is really the only difference in ws and 2.6 around here. I wanted to do a runner but cost kept me away from it at the moment. Also another big thing to me was fuel lines. Every runner I've seen had to have custom bent fuel lines to run over top and I done got a set of pre bent .120 lines. Also think they look gaudy with mess of lines running over top of everything. But y'all must remember I got two complete engines... So a runner is prolly in my future plans. I could gain a lot by a good port job on intake side and a runner.