Subaru Machine Shop Services

Subaru Machine Shop Services

Why Choose Crawford Performance?

  • Motorsport Expertise – Decades of Subaru performance engineering, trusted by professionals and purists alike.
  • Custom-Tailored Performance – Each port and polish job is uniquely crafted to optimize your engine’s performance profile.
  • Precision Craftsmanship – We use advanced CNC technology combined with hand-finishing for unparalleled accuracy.
  • Expert Engineering – Resurfacing performed by skilled technicians with years of Subaru-specific experience.
  • Motorsport-Level Precision – Trusted by enthusiasts and professionals who demand uncompromising quality and performance.
  • Proven Reliability – Our resurfacing service ensures your engine will perform at its peak, every time

Service Offerings

🔧 Subaru Cylinder Head Disassembly & Cleaning – Precision at Every Step 🔧

At Crawford Performance, we go beyond basic service—our Subaru Cylinder Head Disassembly & Cleaning delivers motorsport-grade precision to keep your Boxer engine performing at its peak. For only $199 per set of heads.

Our Comprehensive Process Includes:

✅ Full Cylinder Head Disassembly & Deep Cleaning – Every component meticulously removed and cleaned for a fresh start.
✅ Warp & Thickness Inspection – We measure head flatness and thickness to ensure proper sealing and engine longevity.
✅ Valve Guide Check – Detecting and addressing dropped valve guides before they cause catastrophic failure.
✅ Crack Detection – We carefully inspect spark plug holes and other critical areas for hidden cracks.

🔧 Crawford Performance: Expert Subaru Camshaft R&R Service 🔧

When precision matters, trust Crawford Performance for Camshaft Removal & Reinstallation (R&R) on Subaru’s advanced 4-cam engines. Our expert technicians handle every detail with motorsport-level care—ensuring flawless performance and reliability.

Our Camshaft R&R Service Includes:

✅ Precision Removal – Careful disassembly of all four camshafts to prevent damage to journals and seals.
✅ Thorough Inspection – We check for wear, scoring, and proper camshaft alignment to protect engine longevity.
✅ Reinstallation & Torque – Exact reinstallation with factory torque specs for peak performance.
✅ Sealing & Timing – Ensure correct camshaft seals and precise valve timing for maximum power output.

When it comes to Subaru performance, every detail matters—down to the valve guides. At Crawford Performance, our 16-Valve Guide Removal & Replacement (R&R) service is engineered for those who demand uncompromising precision and reliability.

Our 16-Valve Guide R&R Service Includes:

✅ Precision Removal – Careful extraction of all 16 valve guides without damaging cylinder head surfaces.
✅ High-Performance Replacement – Installation of upgraded, heat-resistant valve guides for superior durability.
✅ Critical Alignment Check – Ensure perfect concentricity for optimal valve seating and airflow.
✅ Expert Fitment & Clearance – Machined to factory tolerances for flawless engine performance under extreme conditions.

🏁 Crawford Performance: Subaru Cylinder Head Port & Polish – Precision for Maximum Power 🏁

When every horsepower counts, Crawford Performance delivers race-proven Subaru port and polish services. Our expert craftsmanship optimizes airflow and combustion efficiency—unlocking higher RPM power, quicker throttle response, and enhanced durability for the road or track.

What Sets Our Subaru Port & Polish Service Apart?

✅ Comprehensive Intake & Exhaust Porting

  • CNC or Hand-Ported Precision – We match and smooth intake and exhaust ports to increase airflow while maintaining optimal velocity.
  • Flow-Bench Tested – Each cylinder head is rigorously tested to ensure maximum air volume and even flow across all ports.
  • Port Matching – Seamless transition between the intake manifold, cylinder head, and exhaust manifold for unrestricted airflow.

✅ Combustion Chamber Optimization

  • Chamber Smoothing – Remove casting imperfections to enhance fuel atomization and prevent hot spots that lead to detonation.
  • Volume Balancing – Ensure consistent chamber volumes for improved cylinder-to-cylinder balance and power delivery.

✅ Exhaust Port Polishing

  • Mirror-Finish Polish – Exhaust ports are polished to a smooth, reflective finish to reduce carbon buildup and improve exhaust gas evacuation.
  • Enhanced Turbo Efficiency – Smoother exhaust flow means faster spool times and reduced backpressure for turbocharged Subaru engines.

✅ Custom-Tuned for Your Build

  • Street, Track, or Race – Whether you’re optimizing a daily driver or building a high-boost race engine, our port work is tailored to your specific performance goals.
  • Valve Seat Blending – We blend the port transitions into the valve seat area for uninterrupted airflow and increased efficiency.

✅ Precision Measurements & Quality Control

  • Blueprinted Accuracy – Every head is machined to factory or custom specifications for perfect fitment and reliability.
  • Surface Inspection – Cylinder heads are checked for flatness and surface finish, ensuring proper head gasket sealing under extreme conditions.

🔧 Crawford Performance: Subaru Cylinder Head Pressure Testing 🔧

Don’t risk your build—know your cylinder heads are leak-free and track-ready. At Crawford Performance, our Subaru Cylinder Head Pressure Testing service ensures your used heads meet the highest standards of performance and reliability.

Our Pressure Testing Process Includes:

✅ Comprehensive Leak Detection – We pressurize coolant and oil passages to identify hidden cracks, porosity, and sealing issues.

✅ High-Temperature Simulation – Heads are tested under real-world conditions to catch leaks that only appear under heat and pressure.

✅ Critical Inspection Points:

  • Spark plug holes – Check for micro-cracks and combustion leaks.
  • Valve seats – Ensure no compression loss or coolant seepage.
  • Coolant and oil passages – Detect internal cross-contamination points.

✅ Certified Results – Each cylinder head undergoes a thorough inspection and receives a detailed report verifying its condition.

🔧 Crawford Performance: Subaru 3-Angle & 5-Angle Valve Jobs – Maximum Airflow, Maximum Power 🔧

For Subaru engines that demand the ultimate in performance, Crawford Performance offers 3-Angle and 5-Angle Valve Jobs—designed to improve airflow, enhance combustion efficiency, and unlock more horsepower across the rev range. Whether you’re building a high-performance street machine or a track-ready monster, we have the perfect valve job for your engine.

Our Valve Job Services Include:

✅ 3-Angle Valve Job

  • Optimized Valve Seating – The 3-angle design improves intake and exhaust flow, creating a smoother seal for better compression and more efficient airflow.
  • Increased Power – Enhanced flow characteristics lead to better throttle response and more power throughout the RPM range.

✅ 5-Angle Valve Job

  • Advanced Valve Seat Angles – The 5-angle design offers even more precision, improving the sealing surface and significantly increasing airflow, resulting in a more aggressive powerband.
  • Maximum Airflow & Performance – Perfect for high-performance builds, the 5-angle seat design unlocks additional horsepower, especially in high-RPM and high-boost applications.
  • Custom Tailored – We fine-tune each seat for your specific needs, from street builds to full-on race engines.

✅ Valve & Guide Inspection

  • Thorough Inspection – All valves and guides are checked for wear, ensuring smooth operation and perfect valve sealing.
  • High-Performance Fitment – We ensure each valve operates flawlessly, allowing for optimal combustion and performance.

✅ Flow Bench Testing (Optional)

  • Verify Performance Gains – Optional flow bench testing ensures that you’re getting the maximum performance from your valve job.