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 up to 800whp.

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 (GSC2056, GSC2055).
  • GSC5068 Conical  – Superior valve control under under 800whp.
  • New OEM Shimless Buckets –Accurate lash setup requires new buckets. Reusing OEM buckets is often impractical on the VR38’s exhaust side, where the short stem height relative to the lock severely limits post-machining adjustments
  • Your choice of reusing your OEM cams or HeadGames provided 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.

Power Pak 1 delivers unmatched performance and reliability for up to 800whp builds with no compromise.

Click to Complete Power Pak 1 Inquiry

OEM Refresh

Restore Your Cylinder Heads to Like-New Condition

(max 600hp 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 Nissan VR38 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 VR38 the refresh it deserves. 📩 Contact us today to learn more!

Click to Complete Aftermarket Refresh Inquiry

Rebuild

Restore and Enhance Your NIssan VR38 Cylinder Head. Our Rebuild Service is the ultimate solution for worn-out valve seats or aging components, ensuring your VR38 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, And they can break, which can lead to catastrophic damage—such as destroying the engine, heads, turbo's!

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.

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, and while it’ll certainly make your car sound great, it could also make it feel laggy. 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. Choose a cam that matches your performance goals for the best balance between sound and feel.

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 700whp. And GSC S1 cams up to 1000whp. This choice helps 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 and has a little head room to make more power later. (spring upgrade needed for more than 800whp)