G80/G81 M3 / G82/G83 M4

• Designed for a rev range of 5200-9200 RPMs
• Quick Throttle response and improved mid range power
• 1200-1800 WHP camshaft set
• Integrated Intake Cam trigger
• Forged Billet Construction
• An Upgraded valve spring upgrade is Required

GSC Power-Division Beehive Valve Spring Kit with Ti Retainer for the BMW S58 includes 24 titanium retainers (12 Intake and 12 Exhaust) and 24 beehive valve springs. Our beehive spring utilizes advanced material heat treatment methods for superior load loss capabilities. These springs have the highest level of spring load retention while still maintaining good fatigue throughout the life of the spring. Beehive springs allow for the use of a smaller, lighter retainer allowing for higher RPM and more valve control. 

• Max RPM: 9,000 RPM
• Max boost: 70 psi

GSC Power-Division Super Alloy Intake Valves for the B58 and S58 Engines are for those running high horsepower, high EGT set ups that need a valve that will last in 2000°F conditions. The Super Alloy Exhaust valves have chrome polished stems to create a smooth, durable finish for added life and better lubricity, especially when paired with the GSC Manganese bronze valve guides. Strength, heat resistance, and performance are engineered into every valve. Under head dish is maximized for weight savings while swirl polished and backcut heads promote better air flow without sacrificing durability.

When creating our valves we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today. With the materials used, we have less valve distortion at the face than any of the tested designs. Less distortion allows for better sealing under extreme conditions and more consistent performance throughout the life of the valve.

Valve Features

• Swirl polished heads for smoother air flow over the valve
• Back cut to reduce valve weight for higher RPM, higher boost pressure, and allow for more aggressive cam profiles without increasing valve spring seat pressures
• Valve stems are micro polished to allow for less oil retention on the stem, which creates less drag on the stem to guide for a smoother motion
• Intake valves are a modified 21-4n stainless
• Valve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear
• Valve tip lengths - we have taken extra time to adjust tip heights on the applications to require less tipping of the valve, to maintain proper tip height for proper valve train geometry, and to cut down on install times when setting valve lash
• We have also adjusted the keeper groove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits
• Valves will work with an OEM keeper/lock or, when available, our upgraded keeper/lock. It is not mandatory, but it is suggested, that any valve lock not be reused on performance applications due to material grooving

• Stem Diameter (mm)	Overall Length (mm)	Head Diameter (mm)
  5	99.55	30.1

GSC Power-Division Super Alloy Exhaust Valves for the B58 and S58 Engines are for those running high horsepower, high EGT set ups that need a valve that will last in 2000°F conditions. The Super Alloy Exhaust valves have chrome polished stems to create a smooth, durable finish for added life and better lubricity, especially when paired with the GSC Manganese bronze valve guides. Strength, heat resistance, and performance are engineered into every valve. Under head dish is maximized for weight savings while swirl polished and backcut heads promote better air flow without sacrificing durability.

• Designed for a rev range of 4500-8500 RPMs
• 1200-1800 WHP camshaft set
• Integrated Intake Cam trigger
• Forged Billet Construction
• These cams require a valve spring upgrade over stock.
• Fitment: The GSC7090S3 camshaft set are correctly paired to vehicles who's OEM Exhaust camshaft part number matches 11318631648.

• Designed for a rev range of 3500-7500 RPMs
• 600-1200 WHP camshaft set
• Integrated Intake Cam trigger
• Forged Billet Construction
• These cams require a valve spring upgrade over stock.
• Fitment: The GSC7090S2 camshaft set are correctly paired to vehicles who's OEM Exhaust camshaft part number matches 11318631648.

• Designed for a rev range of 3000-7000 RPMs
• Quick Throttle response and improved mid range power
• 500-900 WHP camshaft set
• Integrated Intake Cam trigger
• Forged Billet Construction
• A valve spring upgrade is suggest for higher than stock boost.
• Fitment: The GSC7090S1 camshaft set are correctly paired to vehicles who's OEM Exhaust camshaft part number matches 11318631648.

GSC Power-Division Beehive Valve Spring Kit with Ti Retainer for the Toyota/BMW B58 includes 24 titanium retainers (12 Intake and 12 Exhaust) and 24 beehive valve springs. Our beehive spring utilizes advanced material heat treatment methods for superior load loss capabilities. These springs have the highest level of spring load retention while still maintaining good fatigue throughout the life of the spring. Beehive springs allow for the use of a smaller, lighter retainer allowing for higher RPM and more valve control. 

• Designed for a rev range of 4500-8500 RPMs
• Quick Throttle response and improved mid range power
• 800-1400 WHP camshaft set
• Integrated Intake Cam trigger
• Forged Billet Construction
• An Upgraded valve spring upgrade is Required

• Designed for a rev range of 3500-7500 RPMs
• Quick Throttle response and improved mid range power
• 500-900 WHP camshaft set
• Integrated Intake Cam trigger
• Forged Billet Construction
• An Upgraded valve spring upgrade is Required