Skunk2 Racing Pro Series Honda/Acura B-Series VTEC XP Valve Spring Set (Part Number 311-05-7350)

Skunk2 is proud to introduce its Pro Series XP (Extra Pressure) Racing Valve Spring Kits for the Honda B-series VTEC engines. Each kit includes Skunk2's high-quality race-proven dual valve springs that are the result of nearly two decades of racing and engine building experience. 'XP' features a higher seat pressure for turbocharged and extreme high RPM motors. This spring has a seat pressure of 93lbs @ 1.320 in. while keeping the coil bind height for higher lift camshafts. Each Pro Series XP Racing Valve Spring is manufactured exclusively from super-clean, chrome-silicone wire milled in Japan. By using inner and outer springs mated together through a slight interference fit and with differing frequencies, Pro Series XP Racing Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of 11,000 rpm. Wound by a premier North American winder, our Pro Series XP Racing Valve Springs retains its durability and strength that results in improvement to the extreme fatigue limit of the wire and enhanced resistance to load loss. Pro Series XP Racing Valve Springs are engineered to handle the demands of extreme-lift camshafts operating at prolonged, high-rpm use at championship-level racing. Skunk2's Pro Series XP Racing Valve Spring's for the Honda's B-series VTEC engines are simply the best on the market. Pro Series XP Racing Valve Springs have been tested at speeds exceeding 11,000 rpm on our engine dyno, street, and the race track. Our superior, Japanese-milled, super-clean chrome silicone wire is 100-percent eddy-current inspected prior to coiling. Next, they are heat-treated, shot-peened, and chemically polished for strength and durability. A special nitriding process concludes Skunk2's rigorous manufacturing process. The end result is a lightweight valve spring that safely accommodates high-lift camshafts and features superior resistance to load loss, even under extreme operating conditions. Pro Series XP Valve Spring Set; Seat Pressure 93 Lbs At 1.320 in.; Open Pressure 238 Lbs At 0.820 in.; Coil Bind 0.718 in.; Set of 16;

• Prevents Valve Float/Maintain Valvetrain Stability +10000rpm
• Manufactured From Super-Clean Chrome-Silicone Wire
• Open Pressure 238 lbs. At 0.820 in.
• Seat Pressure 93 lbs. At 1.320 in.
• Coil Bind 0.718 in.
• Set of 16

The Skunk2 Racing Pro Series Honda/Acura B-Series VTEC XP Valve Spring Set is engineered for high-performance applications, providing exceptional valvetrain stability at extreme RPMs. Designed specifically for turbocharged and high-lift camshaft setups, these springs feature a seat pressure of 93 lbs at 1.320 inches and an open pressure of 238 lbs at 0.820 inches, ensuring reliable operation during intense racing conditions. Manufactured from super-clean chrome-silicone wire milled in Japan, each spring undergoes rigorous inspection and processing, including heat-treating, shot-peening, and chemically polishing, to maximize durability and fatigue resistance. The specialized nitriding process further enhances the springs' strength and load retention, making them suitable for engines operating beyond 11,000 rpm. These dual valve springs are carefully matched with inner and outer springs to prevent valve float and maintain stable valvetrain performance at high engine speeds. Wound by a premier North American manufacturer, the springs are lightweight yet robust, capable of handling extreme lift and prolonged high-RPM use without compromising reliability. The set includes 16 springs, perfectly suited for a variety of Honda and Acura models equipped with B-series VTEC engines, including the Civic del Sol, Civic, and Acura Integra from 1994 to 2001. Whether for street use or championship-level racing, the Skunk2 XP Valve Spring Set offers unmatched performance and durability, backed by extensive testing and quality control to ensure consistent, reliable operation under demanding conditions.

Features:

• Prevents valve float and maintains valvetrain stability at speeds exceeding 10,000 rpm

• Manufactured from super-clean chrome-silicone wire milled in Japan

• Open pressure: 238 lbs at 0.820 inches

• Seat pressure: 93 lbs at 1.320 inches

• Coil bind height: 0.718 inches

• Set of 16 springs designed for high-RPM and high-lift camshafts

Fitment:
1992 Acura Integra GS-R
1993 Acura Integra GS-R
1994 Acura Integra GS-R
1994 Honda Civic del Sol VTEC
1995 Acura Integra GS-R
1995 Honda Civic del Sol VTEC
1996 Acura Integra GS-R
1996 Honda Civic del Sol VTEC
1997 Acura Integra GS-R
1997 Acura Integra Type R
1997 Honda Civic del Sol VTEC
1998 Acura Integra GS-R
1998 Acura Integra Type R
1999 Acura Integra GS-R
1999 Honda Civic Si
2000 Acura Integra GS-R
2000 Acura Integra Type R
2000 Honda Civic Si
2001 Acura Integra GS-R
2001 Acura Integra Type R

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1