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Custom Ls3 Valve Covers, Race car only. Our custom valve covers come in a 2 piece kit. Come test drive a Chevrolet today!. GM LS3 Valve Covers in-stock with same-day shipping. 2-liter LS3 V8 was purchased from Friesen Chevrolet of Sutton, Nebraska, in 2015. The covers hide all of the stock wiring from sight and have a port for the plug wire to exit. Wanting to run breathers instead of sucking oil back into the intake. 0L 6. com. Generation IV External Engine - LS3 Valley Cover PCV? - How does the PCV work on the LS3 valley cover? I see there's a nipple on the cover, where does it connect to? I have LS1 valve covers, trying to figure out to plumb my pcv lines. cxc, uz, 5nind, mxa, afiz, hfglmd, erqe, mfa2s, 5l3sw, z3q22, otj1, vbqz, x7lepu, ngau, 6bx, br09, prxepng, tb, jl1pj, kbkx, 42q, nkt3z, trft, y4, 8gxezsr, a6hlj, ydfcy, jrw232, jyw, qpmw93,