Skunk2 Alpha Series Honda D Series VTEC Valve Spring Set - 311-05-1345

Manufactured exclusively from super-clean, chrome-silicone wire milled in Japan, Skunk2’s Alpha Valve Springs for Honda’s D-series VTEC engines are a product of the company’s years of racing and engine building experiences. Alpha Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of 10,000 rpm. Skunk2 designs, develops, and tests its entire valvetrain lineup in-house to ensure superior quality and maximum performance gains. During development, each valvetrain component is tested both on the dyno and the road, including 11,000 rpm drag racing engines and 17,000 rpm superbikes. Manufactured from the best materials available, Skunk2 valvetrain components provide exceptional performance, reliability, and quality and remain standard-issue on each Skunk2 vehicle that we build and support.

Whether its for a full rebuild or some standard maintenance, the proper engine components are needed to make sure your vehicle is running smooth.

Upgrading your valve springs and retainers is the best way to help your car rev higher. If your are looking to increase the horsepower of your engine, your may have considered rebuilding the head. When rebuilding your engine's head, we recommend upgrading your valves, and springs. This will increase airflow and the RPM of your engine.

WARNING: Cancer & Reproductive Harm. For more information, go to www.P65Warnings.ca.gov

All Skunk2 products are carefully planned and designed in-house using the latest computer simulation and modeling techniques, followed by careful testing in controlled laboratory environments using state-of-the-art equipment. Each product is then subjected to rigorous dyno, street, and race track testing to ensure proper performance in the most extreme conditions. For these reasons, top street cars and race cars worldwide rely on Skunk2 products. As part of Skunk2’s commitment to developing industry-leading products, we’ve remained actively involved in various forms of motorsports through technical partnerships, sponsorships, as well as with our own race vehicles for more than 15 years. We’ve gone on to secure a number of drag racing and road racing records and championships, including earning the title of the world’s first 10-second naturally aspirated Honda. Racing provides us with the data necessary to produce high-performance parts utilizing innovative designs, advanced metal alloys, cutting-edge manufacturing methods, and stringent quality-control measures. Driven by the desire to make things go faster, Skunk2’s staff is comprised of industry leaders, racers, and enthusiasts who are passionate about what they do and understand what other enthusiasts want. Our perspective is shaped by real-world racing experiences as well as by practical science, and that's precisely what makes Skunk2 products so good. Firmly grounded in our understanding of engineering, we make every effort to embrace advanced technology. Our goal is to make performance and technology accessible to other enthusiasts through innovative manufacturing techniques. Since 1994, we’ve released a number of industry-leading products, including the first cast aluminum, high-performance intake manifold, cutting-edge composite fuel rails, and valvetrain components made from premium materials. Skunk2 is acclaimed as being the first U.S.-based sport compact parts manufacturer to offer CNC-machined, adjustable cam gears in 1995 as well as billet camshafts in 1999. As a result of continually pushing our engine development capabilities in the racing world, we’ve discovered a number of exciting “power secrets” that are incorporated into every Skunk2 product. Today we continue our tradition of creating leading-edge products through a state-of-the-art engineering and R&D department as well as through extensive engine development and testing both on the race track and the street.

• 1987 Acura Integra LS
• 1987 Acura Integra LS Special Edition
• 1987 Acura Integra RS
• 1987 Honda Wagovan DX ( 4 door Wagon, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1988 Acura Integra LS
• 1988 Acura Integra LS Special Edition
• 1988 Acura Integra RS
• 1988 Honda Civic DX
• 1988 Honda Civic LX
• 1988 Honda Civic RT 4WD ( 4 door Wagon, U/KHP 4 Cylinder Naturally Aspirated 1.6L, 4WD 5speed Manual)
• 1988 Honda CRX Si
• 1988 Honda CRX DX
• 1989 Acura Integra LS
• 1989 Acura Integra RS
• 1989 Honda Civic DX
• 1989 Honda Civic LX
• 1989 Honda Civic RT 4WD
• 1989 Honda Civic Si ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1989 Honda CRX Base
• 1989 Honda CRX Si ( 2 door Coupe, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1990 Honda Civic DX
• 1990 Honda Civic EX
• 1990 Honda Civic LX
• 1990 Honda Civic RT 4WD
• 1990 Honda Civic Si ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1990 Honda CRX Base
• 1990 Honda CRX HF ( 2 door Coupe, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1990 Honda CRX Si ( 2 door Coupe, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1991 Honda Civic DX
• 1991 Honda Civic EX
• 1991 Honda Civic LX
• 1991 Honda Civic RT 4WD
• 1991 Honda Civic Si ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1991 Honda CRX Base
• 1991 Honda CRX HF ( 2 door Coupe, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1991 Honda CRX Si ( 2 door Coupe, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1992 Honda Civic CX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1992 Honda Civic DX
• 1992 Honda Civic EX
• 1992 Honda Civic LX
• 1992 Honda Civic Si ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1992 Honda Civic VX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1993 Honda Civic CX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1993 Honda Civic DX
• 1993 Honda Civic EX
• 1993 Honda Civic LX
• 1993 Honda Civic Si ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 5speed Manual)
• 1993 Honda Civic VX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1993 Honda Civic del Sol S
• 1993 Honda Civic del Sol Si
• 1994 Honda Civic CX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1994 Honda Civic DX
• 1994 Honda Civic EX
• 1994 Honda Civic LX
• 1994 Honda Civic Si
• 1994 Honda Civic VX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1994 Honda Civic del Sol S
• 1994 Honda Civic del Sol Si
• 1995 Honda Civic CX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1995 Honda Civic DX
• 1995 Honda Civic EX
• 1995 Honda Civic LX
• 1995 Honda Civic Si
• 1995 Honda Civic VX ( 2 door Hatchback, U/KHP 4 Cylinder Naturally Aspirated 1.5L, FWD 5speed Manual)
• 1995 Honda Civic del Sol S
• 1995 Honda Civic del Sol Si
• 1996 Honda Civic del Sol Si
• 1996 Honda Civic CX
• 1996 Honda Civic DX
• 1996 Honda Civic EX
• 1996 Honda Civic LX
• 1996 Honda Civic del Sol S
• 1997 Honda Civic CX
• 1997 Honda Civic DX
• 1997 Honda Civic EX
• 1997 Honda Civic LX
• 1997 Honda Civic del Sol S
• 1997 Honda Civic del Sol Si
• 1998 Honda Civic CX
• 1998 Honda Civic DX
• 1998 Honda Civic EX
• 1998 Honda Civic LX
• 1999 Honda Civic CX
• 1999 Honda Civic DX
• 1999 Honda Civic EX
• 1999 Honda Civic LX
• 1999 Honda Civic Value Package ( 4 door Sedan, U/KHP 4 Cylinder Naturally Aspirated 1.6L, FWD 4speed Automatic)
• 2000 Honda Civic CX
• 2000 Honda Civic DX
• 2000 Honda Civic EX
• 2000 Honda Civic LX