Best brand of intake and exhaust valves?
Hey everyone, got the heads off the ole 7.3 and figured I may as well give the heads a refresh. What is the best brand of valves for these 7.3's? The machine shop said Mahle is great quality, has anyone heard or have experience with Engine pro's nitro black valves? Seems like they are supposed to be a upgrade over the factory valves and at $330ish for a complete set of intake/exhaust valves seems like it's a decent deal as well.
97 ext. cab 7.3 4x4 - 3.55 gears, lifted 2.5" on all four, 325/60r18 toyo AT 2s, Built trans., upgraded trans. cooler, Rosewood 250cc 100% hybrids, T500 HPOP, Swamps IDM, DIY intake, 3.5" downpipe, 5" exhaust with 7" stack, Stock turbo with WW2, EBV high flow housing, EBV delete pedestal, Isspro gauges, TW tunes. 13.4 at 99mph