Yella Terra Platinum Roller Rockers BBF 1.73 ADJ Ratio YT6321

Yella Terra Platinum Roller Rockers is Engineered for the most severe race applications on the planet, Platinum rockers feature “wide body” arms for even greater strength and resistance to deflection. Capable of handling open spring pressures in excess of 900lbs*, all platinum rockers feature heavy-duty 7/16” mountings for unsurpassed rocker stability. Platinum rockers are available in twin shaft versions for parallel valve applications and unique single shaft designs for canted valve cylinder heads. The Platinum range covers most popular factory and aftermarket performance heads in a choice of ratios and offsets.

Factory Head - Compatible with 302 Oval Combustion Chamber, 351 Round Chamber, Cleveland 400, Big Block Ford 429 and 460.

Machine .300 - .320” from rocker pads.

Drill and tap 7/16” UNC.

Drill head for pedestal aligning pin (drill align tool & pin supplied).

Hydraulic kits are designed specifically for use with hydraulic lifters. Adjustable kits are designed for use with both hydraulic and mechanical (solid) lifters.

Extruded from aircraft grade aluminium, perfect for dissipating excess top-end heat.

Aftermarket Heads w/ Factory Valvetrain Geometry - Compatible with AFD: 2V & 4V, A-460, BRODIX: BBF, C.H.I: 3V Alloy, C.H.I: KAASE C400, PRO-FILER PERFORMANCE: BBF, EDELBROCK: Performer RPM 460, 351C & Clevor, TRICK FLOW SPECIALTIES: Powerport, FORD RACING.

Hydraulic kits are designed specifically for use with hydraulic lifters. Adjustable kits are designed for use with both hydraulic and mechanical (solid) lifters.

Extruded from aircraft grade aluminium, perfect for dissipating excess top-end heat.

EASY FIT Rockers bolt on. Fits standard mountings. No machining required.

Drill head for pedestal aligning pin (drill align tool & pin supplied).