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The YTP-YT-5123 valve cover spacer incorporates special scalloped sections which provide the required clearance and allows the fitment of the original factory covers for an OEM look. When fitting YT Adjustable Rockers to LS1, LS2, LS3, LS7 & LSX based engines, the heel of the rocker may require clearance at the inner edge of the cylinder head valve cover rail. Other Yella Terra rocker components such as the trunnions, posi locks and bearings greatly enhance valve train durability in performance applications.The use of needle roller bearings at the rocker fulcurm combined with roller tip at the valve greatly reduces horsepower robbing friction in the valve train to provide a measurable power increase over standard rocker systems. Pressed steel rocker arms, in high performance applications, are prone to failure, A high rate of fulcrum wear, flexing, cracking, splitting and breakage are common problems that will result in power loss or possible piston failure due to detonation of the incoming air/fuel charge. Ed, the heads are angle plug 3991492 castings Ive also just come across a Speedway Motors advert where they have a shaft setup for 454.99 which is well cheap but dont know if they are too cheap.
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1.8 YELLA TERRA ROCKERS PRO
1675-16 Ultra Pro Magnum 1.8 Ratio Rocker Arm Set for GM LS1/LS6 w/ 3/8 Stud. The rocker arms used on Yella Terra and Street Terra roller rockers are infinitely stronger than standard pressed steel arms providing the best in resistance to bending and breakage under high spring pressures at high RPM's. Re: Yella Terra & Probe Industries Shaft Rockers Thanks for the additional feedback people. YELLA TERRA yt6321 PLATINUM Shaft Mount Roller Rockers w/ 1.73 Ratio Ford. The skinny part of the pedestal goes towards the rocker arms. Push the stock bolts through the top of the rockers down through the bottom, place the rocker pedestal over the threaded part of the bolt and butt it up to the bottom of the rocker. Yella Terra Ultra lite shaft Rocker arms bolt on roller rocker set, to suit LS3,L98 These rocker arms come as a complete set with 8.0mm bolts. Now, grab a yella terra rocker pair, 2 yella terra pedestals, and 2 shims from the box.