Yella Terra Roller Rockers are arguably the strongest aluminum rocker arms in the world. Deflection and bend test prove their aircraft grade extruded aluminum arms are superior to rival aluminum and stainless steel arms. They are simply the ultimate rocker arms for use in high revving street engines and many race applications.
Dependability
The Yella Terra PerfectTune system of roller rockers has never let a competitor down at our high speed proving grounds at the Calder Park Thunderdome. And we want you to experience that confidence too in our complete line up of Roller Rockers. Whether you’re a hobbyist or full on enthusiast, Yella Terra has a Roller Rocker solution for you.
Street Terra
Street Terra
Reduced cost, same legendary performance
Yella Terra Street Terra rockers are there to give you the same legendary performance of premium race Yella Terra components at a fraction of the cost. Compared to factory, the Yella Terra Street line up dramatically improves power and performance by giving you the race proven engineering and design of the PerfectTune Yella Terra team for fractions of what you would pay otherwise.
Eliminate side thrust, reduce wear
The true roller tip design behind Yella Terra Street Rockers reduces valve side thrust and gives you more life from your valve stems, guides and seats. That means less maintenance and more track time.
Smoother, cooler, quieter operation, improve cylinder head life
Keep speed and performance up while keeping temperatures and noise down. Yella Terra Street optimizes the valve train while keeping things cool and quite. That gives you more performance, easier maintenance, and a longer cylinder head life.
Higher rev potential
Yella Terra Street Rockers set the stage for higher revs with their precision wheel tip rockers and superior trunion mounts and captive bearings. You get the confidence you need to take your engine into the higher rev ranges knowing that the Yella Terra Street rockers are there keeping your valve train hopping while running smoother, quieter, and cooler.
Easy installation, no cylinder head modification and all hardware supplied
Yella Terra Street Roller Rockers are designed to easily mount to the existing head with no modifications. All hardware is supplied, and generally, installation takes an hour and there are no special skills required. You get the power and performance of Yella Terra easily and hassle free.
Torrington needle bearings mated to full shaft and trunions
Yella Terra Street uses a fully captured, oversized Torrington needle bearings mounted on an 11/16″ shaft which is much larger than factory, it carries the load better. And the nose-wheels are the lightest in the industry which keeps the weight over the valve limited. You can run less spring pressure yet keep the same valve control. The design incorporates high density aluminum arms and true roller-tips giving you smooth, quite, and cooler operation while eliminating side thrust and wear and extending the life of your components.
Nominal ratios from 1.5 to 1.8 with adjustable and non adjustable versions
Increase lift easily with optimally designed ratios. Adjustable and non adjustable designs give you maximum flexibility in your build.
Superior quality heat treated, hardened, and ground shafts and trunions
Yella Terra Street Rockers are manufactured under stringent guidelines and quality control using the best quality materials. PerfectTune, Yella Terra’s manufacturing arms, has decades of experience in the manufacturing of racing components. That experience carries through in every component of Yella Terra Street rockers.
Install in about an hour, no special skills needed
Yella Terra has made a point of making performance easy with the Yella Terra Street series of rockers. All hardware is supplied, and stud rockers come with locking nuts and set screws. Every component of the Yella Terra Street rocker system has full factory support for replacement parts.
Light weight and Narrow Body options
Yella Terra and Perfectune have combined even more advanced Roller Rocker combinations in their Street lineup to include ultra-light (blue tab) and narrow body (yellow tab) configurations. The commitment to performance is carried to the next level in these components, offering you even more options for strengthening and increasing performance in your valve train.
Between factory and Yella Terra, it’s not even a fair comparison.
Yella Terra (Pro Street)
Pro Street
Yella Terra Roller Rockers have proven to be so reliable and durable since 1983, with the ultimate in design and proven by official Holden racing teams such as NASCAR AUSCAR and Commodore cup to give more power and reliability than other products.
The strongest aluminium rocker arms in the world with deflection and bend tests proving their aircraft grade extruded aluminium arms superior to rival aluminium and stainless steel arms. They are the ultimate rocker arm for use in high revving street engines and most race applications.
Premium quality Yella Terra extruded alumiunum roller rockers have never let a competitor down at our high speed proving grounds (Calder Park Thunderdome), where Holden and Ford Auscars required to run our roller rockers having battled in racing at an average speed of over 200km for an estimated 100,000 laps. The rockers ran for over 170,000 km at between 5000-6500 rpm.
Friction fighting roller tips minimize valve stem and guide wear and give a smoother quieter operation, correct geometry improves efficiency by ensuring maximum camshaft lift is achieved.
These products are internationally sold and acclaimed and have a superior design with a super strong arms which are fully machined from heat treated certified aircraft alloy extrusion. They are fitted with hugh needle roller bearings mated to precision ground trunnions/shafts to reduce friction and increase engine power.
A huge selection of bolt on styles – Hydraulic or Adjustable – that can be fitted in less than an hour.
- Stud Mount
- Bolt on Easy Fit
- Pedestal and Shaft
- Standard and Hi ratio
- Come in Standard, Stealth and Ultra-light arms
Platinum Race Rockers
Platinum
The Platinum Race rockers are designed for the most severe race applications and have the feature of wide body arms for even greater strength and resistance to deflection. All Platinum rockers feature a heavy duty 7/16″ mountings for unsurpassed rocker stability.
The Platinum rockers are available in twin shaft versions for parallel valve applications and unique single shaft designs for cant valve small block and big block engines. The range covers most popular factory and aftermarket performance heads in a choice of ratios.
- Rigid Mounted 7/16″
- Pedestal and Shaft
- Single and Twin Shaft
- Adjustable only
- Solid roller cam and flat tappet applications
Yella Terra Ultralite
Ultralite
- Yella Terra has developed shaft and pedestal systems for late model engines that have less than half the nose weight of other rocker designs to correct valve float when some performance camshafts are used with lightweight valve train components and conical springs.
- The result is greater RPM potential without sacrificing strength or reliability.
- Standard and high ratio options are available.
Ready To Boost Your Performance?
To really boost the performance of your engine, you need the right parts. We’ve been making hi-performance
products that have been winning championships, lowering ETs, increasing MPHs and burning up tarmacs for more than 45 years.
