We provide a variety of specialized services designed to optimize your cylinder heads for peak performance, whether you're restoring or upgrading. Below are the services available for the 500-700whp range.

Power Pak 1

Our Power Pak 1 includes premium parts and expert services to elevate your build.

Included Services and Parts:

  • New Core or You Supply Your Used Core – Fresh reliability and performance.
  • GSC Power Division Valves – Stock size for optimal flow (GSC2062, GSC2061).
  • GSC5064 (600-700whp) Conical or 5744 Single Cylindrical Spring Kit (500-600whp) – Superior valve control under extreme conditions.
  • New OEM Shimless Buckets – Improved durability and precision.
  • Your Choice of BC 264 or GSC S1 Cams – Optimized for power and drivability.

Services:

  • Rebuild with Guides – Includes disassembly, cleaning, GSC bronze guide installation, precision valve job, lash setting, milling, and professional assembly.
  • Clearance for Cams – Ensures proper fitment.

Power Pak 1 delivers unmatched performance and reliability for 500-700whp.

Click to Complete Power Pak 1 Inquiry

OEM Refresh

Restore Your Cylinder Heads to Like-New Condition

(max 550whp for this service)

If you're restoring your car and returning it to stock, our Refresh Service is the perfect choice. Here’s what’s included:

Included Services:

  • Comprehensive Cleaning: We thoroughly clean your cylinder heads.
  • Valve Reconditioning: Cleaning and refacing of your valves to restore optimal performance.
  • Valve Seat Refresh: Ensures proper sealing and durability.
  • Lash Adjustment: Precisely set for proper operation.
  • Milling: Provides a fresh sealing surface.
  • Assembly: Includes checking spring height, and brand-new Viton valve seals for long-lasting reliability.

With our Refresh Service, your cylinder heads will be restored to like-new condition, ready for years of dependable performance!

Click to Complete OEM Refresh Inquiry

Aftermarket Refresh

Our Toyota 2JZ Aftermarket Refresh service ensures your aftermarket valvetrain is optimized for peak performance.

Included Services:

  • Disassembly & Inspection – We carefully disassemble and inspect every component.
  • Cylinder Head Inspection – We check for cracks, warping, and overall condition to ensure reliability.
  • Valvetrain Verification – Ensuring all aftermarket components are correct and properly matched for your setup.
  • Spring Height Check – Verification of your aftermarket spring kit’s height for proper functionality.
  • Valve Inspection – Detailed assessment of all your aftermarket valves.
  • Valve Job Touch-Up – Precision adjustments to improve sealing and flow.
  • Lash Adjustment – Set to match your aftermarket camshafts perfectly.
  • Milling & Assembly – A fresh sealing surface and professional reassembly.

Important Notes:

This service is subject to compatibility. If the valvetrain components in your cylinder head do not meet our specifications for safe and reliable operation per your WHP goals, we may decline assembly to ensure quality and performance standards.

Give your 2JZ the refresh it deserves. 📩 Contact us today to learn more!

Click to Complete Aftermarket Refresh Inquiry

Rebuild

Restore and Enhance Your Toyota 2JZ Cylinder Head. Our Rebuild Service is the ultimate solution for worn-out valve seats or aging components, ensuring your 2JZ head performs better than new. Here’s what’s included:

Included Services:

  • Inspection & Diagnosis: We assess valve seat wear and identify issues caused by insufficient spring pressure.
  • Comprehensive Cleaning: Complete disassembly and thorough cleaning of all components.
  • Valve Reconditioning: Cleaning and refacing of your valves to restore optimal performance.
  • Precision Valve Job: Performed on our state-of-the-art seat and guide machine for maximum sealing and flow.
  • Lash Adjustment: Precisely set to ensure compatibility with your setup.
  • Milling: Provides a fresh sealing surface.
  • Reassembly: Includes setting proper spring height and installation of new Viton valve seals for lasting reliability.

 Experience a Rebuild That’s Better Than New. Contact us today to schedule your service.

Click to Complete Rebuild Inquiry

Rebuild w/ Guides

Required with Any Valve Upgrade

Upgrading your valves? Our Rebuild with Guides Service is essential to ensure proper valve-to-guide clearance and long-lasting performance.

Included Services:

  • Comprehensive Cleaning: We thoroughly clean your cylinder heads to prepare them for upgrades.
  • GSC Bronze Guide Installation: Installing high-performance GSC Power Division bronze valve guides and sizing them for perfect valve-to-guide clearance.
  • Precision Valve Job: Maximizing flow and ensuring optimal sealing.
  • Lash Adjustment: Precisely set to match your camshafts.
  • Milling: Providing a fresh sealing surface.
  • Reassembly: Your cylinder heads are reassembled with care, ensuring peak durability.

This process guarantees years of reliable, high-performance, boosted power! Contact us today to upgrade your valves the right way.

Click to Complete Rebuild w/ Guides Inquiry

Not All Parts Are Created Equal—Here’s How We Pick the Best for Your Build!

Valve Upgrades

If you choose to upgrade your valves, you will need at minimum our Rebuild with Guides Service. This is necessary because the stem size of OEM valves differs from aftermarket valves. Installing an aftermarket valve in an OEM steel guide can create excessive valve-to-guide clearance, which may cause premature guide wear.

If your budget allows for a valve upgrade, we highly recommend it. OEM exhaust valves are prone to burning, which can lead to significant damage—such as destroying the heads, turbo, or valve seats.

Spring Pressure Considerations

A common concern when selecting a spring kit is adding too much spring pressure, particularly for street applications. However, when it comes to spring pressure, more is generally better than less. Insufficient pressure can lead to valve float, which can cause significant damage to your engine. Proper spring pressure ensures stable valve control and prevents potential issues at higher RPMs.

Importance of Correct Valve Spring Pressure

The right amount of spring pressure ensures the springs remain controlled, which in turn keeps the valves functioning properly. The number one cause of valve-train or cam/bucket failure is using the wrong valve spring for your application. If the valve spring isn’t up to spec, nothing else in the system will perform at its best. Proper spring selection is key to maintaining reliability and preventing costly damage.

DLC Coated buckets and wear

There's been a lot of misinformation circulating about the need for DLC-coated buckets when running billet steel camshafts in the 2JZ. Some have claimed that these buckets are mandatory—but that's simply not true.

The reality is, a cam follower (often called a "bucket") is designed to follow the camshaft. However, in high-RPM conditions where valve float occurs, the cam is no longer just rolling over the bucket—it’s slamming into it. This aggressive impact displaces oil, and when the bucket runs dry, a DLC coating won’t save it. In fact, the opposite happens: the coating shatters under extreme stress, sending debris into your engine.

At HeadGames Motorworks, we’ve tested DLC coatings in race applications and have seen them fail. Instead of relying on a band-aid solution, we focus on the real fix: ensuring proper clearance between the cam lobes and the head casting, along with setting up the correct valve spring height. Not all head castings are identical, and some lobes might sit too close to the casting, whisking oil away from the lobe and causing dry contact. By clearancing the head and using the right valve spring setup, we prevent the conditions that lead to premature wear and failure—saving you time and money.

We don’t just follow internet hype; we provide real solutions based on experience and data. If you have questions about your 2JZ valvetrain setup, we're here to give you the "why"—not just opinions.

Choosing the Right Camshaft

Planning to relax in a lawn chair and listen to your car? If so, you might be tempted to go for the biggest cams on the market. While that’ll certainly make your car sound great, it could also make it feel laggy and unresponsive. A camshaft that’s too large can deliver the sound you’re looking for, but at the cost of drivability, especially in terms of throttle response and power delivery.

We’ve already chosen the right camshaft for optimized performance at this power level on our Jotform. This comes from years of real-world experience and a deep understanding of camshaft dynamics that is unrivaled. Whether you need help selecting a cam or want to use our proven recommendations, you can find the best option for your build by filling out the JotForm provided.

The Right Cam for Boosted Performance

If you love pushing your car to its limits and diving into boost on the street, a smaller cam is your best bet! We recommend sticking with stock cams up to 550whp. And from 550whp-1000whp we suggest the GSC S1 cam with our cam clearance service ,They provide plenty of area under the power curve, ensuring smooth, reliable performance that keeps both your dyno and your smile happy for miles of boosted fun.