Yella Terra brings affordable race rockers into the 21st century, eliminating the problems associated with studs, guide plates and stud girdles. Serious engine builders use and recommend shaft rockers for a more stable valve train and more horsepower.
Platinum Twin Shaft Rocker Arms Intake and exhaust rockers are joined in pairs on a shaft that is 22% larger and engineered
Ultralite Rocker Arm Sets Advanced Ultralite Rocker Arm Sets offer 50% less nose weight when compared to OEM rocker arms, increas- ing RPM potential, while also providing
for extreme RPM. Maximum width bear- ings deliver greater rigidity, resistance to breakage and superior load carrying ability, eliminating the need for screw-in studs. Rocker arms bolt to existing 7/16" stud mountings with bolts supplied. Easy to service in the field. Sold in sets of 16. Part No. Description Cylinder Head Ratio YTRYT6008 SB Chevy 265-400 OEM/Bowtie/AFR/Dart/ World/Brownfield 1.55/1.55 YTRYT6009 SB Chevy 265-400 OEM/Bowtie/AFR/Dart/ World/Brownfield 1.6/1.6 YTRYT6341* SB Chevy 265-400 OEM/Bowtie/AFR/Dart/ World/Brownfield 1.6/1.5 YTRYT6620 SB Chevy 265-400 Dart Pro-1 1.5/1.5 YTRYT6323 SB Ford Windsor 289-351W Brodix/Dart/Edelbrock/ Motorsport/Trick Flow 1.6 * Rocker arms in this kit have an extra .070" pushrod offset on intake for repaired or wider ports. Platinum Single Shaft Rocker Arms Affordable shaft-type platinum
added strength and durability. Kits, which are of- fered in standard or high rocker ratios, are designed for hydraulic camshaft applications with a maximum open spring pressure of 400 lbs. Part No. Description Ratio YTRYT6638* Chevy LS1 5.7L, 1997-Up Corvette; 1998-02 Camaro/Firebird, Adjustable 1.7
Chevy LS1 5.7L, 1997-Up Corvette; 1998-02 Camaro/Firebird, Hyd. Chevy LS1 5.7L, 1997-Up Corvette; 1998-02 Camaro/Firebird, Hyd.
YTRYT6645
1.8
YTRYT6646
1.7 1.7
YTRYT6667 Chevy LS3 6.0L, 2008-13 Corvette; 2010 Camaro SS, Hyd. YTRYT6685 Chevy LS3 6.0L, 2008-13 Corvette; 2010 Camaro SS, Hyd. 1.85 YTRYT6670 Chevy LS7 7.0L, 2006-13 Z06 Corvette; 2014 Camaro Z28, Hyd. 1.8 * Kit featuring adjustable rocker arms requires YTRYT5123 valve cover spacers for clearance.
Rocker Pedestal And Saddle Shims For Twin Shaft Platinum Rockers. Part No. Description YTRYT6239 Shim, .025" (0.6mm) Black, Each YTRYT6240 Shim, .050" (1.3mm) Gold, Each YTRYT6241 Shim, .100" (2.5mm) Silver, Each
rockers for canted valve engines such as Chevy and Ford. Dowel pins under each mount prevent rocker misalign- ment and rotation. Sold in sets of 16. Part No. Description
LS Valve Cover Spacers Engineered for popular GM LS
Cylinder Head OEM/Brodix -1, -2
Ratio
YTRYT6317 BB Chevy 396-454 YTRYT6603 BB Chevy 396-454
1.7 1.7
OE/Brodix/Dart/Edelbrock/World
engines, spacers provide necessary clearance when installing aftermar- ket rocker arms, such as Ultralite adjustable units. Spacers are .500" tall and sold per pair, complete with seals. Part No. Description YTRYT5123 LS Valve Cover Spacers YTRYT5132 Replacement Seal
Ford 351C, 351M-400, 429-460 OE/CJ/SCJ/Motorsport/Trick Flow/Wilburt 1.73
YTRYT6321
Traction-Loc Differentials Fully loaded differential carriers are manu- factured using billet steel left and nodular iron right cases fitted with forged 4320 steel internal gears and premium Raybestos clutches.
Duragrip Positraction Differentials
Ideal for street/strip applications, fully rebuildable units utilize an aggressive design for maximum traction. Part No. Description YKNYDGF8-28-AG Ford 8", 28-Spline Axles, Aggressive Design YKNYDGF9-28-AG Ford 9", 28-Spline Axles, Aggressive Design YKNYDGF9-31-AG Ford 9", 31-Spline Axles, Aggressive Design Grizzly Lockers
Duragrip differentials incorporate Raybes- tos clutches for effective clutch lock-up, while delivering torque to the tire with the most traction. Fully rebuildable units feature nodular iron cases fitted with forged 4320 steel internal gears for maximum durability. Part No. Description YKNYDGF8.8-28-1
Ford 8.8", 28-Spline Axles Ford 8.8", 31-Spline Axles
Grizzly Lockers deliver full, 100% power to both tires, while allowing disengagement for smooth turning. Differentials are fully as- sembled in the USA using premium 8620 steel components and feature a patent-pending design. Covered by a 1-year warranty. Part No. Description YKNYGLD60-3-35
YKNYDGF8.8-31-1
GM 8.875" 12-Bolt Passenger, 30-Spline Axles, 3.08-3.90 Gear Ratios GM 7.5"/7.625" 10-Bolt, 28-Spline Axles GM 8.5" 10-Bolt, 28-Spline Axles GM 8.5" 10-Bolt, 30-Spline Axles
YKNYDGGM12P-3-30-1 YKNYDGGM7.5-3-28-SM YKNYDGGM8.5-3-28-1 YKNYDGGM8.5-3-30-1
Dana 60, 35-Spline Axles, 4.10 And Lower Gear Ratios Dana 60, 35-Spline Axles, 4.56 And Up Gear Ratios
YKNYGLD60-4-35 YKNYGLF9-31
Ford 9", 31-Spline Axles
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