Have Questions?
Professional-grade parts used trackside.
Expert help during business hours.
Encrypted checkout & trusted payments.
Orders ship quickly from regional warehouses.
Enhance your Honda D-series engine's performance with the Skunk2 Racing Alpha Series Valve Spring Set, part number skk311-05-1345. Manufactured exclusively from high-quality chrome-silicone wire milled in Japan, these springs are engineered to provide exceptional durability and reliability under demanding conditions. Designed to prevent valve float and ensure valvetrain stability at engine speeds surpassing 10,000 rpm, this set is ideal for high-performance applications. Skunk2's in-house design, development, and testing process guarantees that each component meets rigorous standards, tested on dynos and real-world engines including drag racing and superbikes. The Alpha Series springs feature a seat pressure of 165 pounds at 1.5 inches and an open pressure of 585 pounds, offering optimal tension for aggressive engine tuning. This set includes 16 springs, ensuring a comprehensive upgrade for your Honda's valvetrain. Whether you're building a track-ready race engine or enhancing daily driver performance, these springs deliver consistent power and stability. The robust construction and precise manufacturing make them a trusted choice for serious enthusiasts and professional tuners alike. Compatible with Honda Civic models from 1989 to 1991, these springs are a direct fit for your D-series VTEC engine, providing a reliable upgrade to support higher RPM limits and aggressive cam profiles. Trust Skunk2 Racing for performance-driven components that push the limits of your vehicle's capabilities.
Features:
Fitment:
1986 Acura Integra LS
1986 Acura Integra RS
1987 Acura Integra LS
1987 Acura Integra LS Special Edition
1987 Acura Integra RS
1987 Honda Wagovan DX
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
1988 Honda CRX DX
1988 Honda CRX Si
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
1989 Honda CRX Base
1989 Honda CRX Si
1990 Honda Civic DX
1990 Honda Civic EX
1990 Honda Civic LX
1990 Honda Civic RT 4WD
1990 Honda Civic Si
1990 Honda CRX Base
1990 Honda CRX HF
1990 Honda CRX Si
1991 Honda Civic DX
1991 Honda Civic EX
1991 Honda Civic LX
1991 Honda Civic RT 4WD
1991 Honda Civic Si
1991 Honda CRX Base
1991 Honda CRX HF
1991 Honda CRX Si
1992 Honda Civic CX
1992 Honda Civic DX
1992 Honda Civic EX
1992 Honda Civic LX
1992 Honda Civic Si
1992 Honda Civic VX
1993 Honda Civic CX
1993 Honda Civic DX
1993 Honda Civic EX
1993 Honda Civic LX
1993 Honda Civic Si
1993 Honda Civic VX
1993 Honda Civic del Sol S
1993 Honda Civic del Sol Si
1994 Honda Civic CX
1994 Honda Civic DX
1994 Honda Civic EX
1994 Honda Civic LX
1994 Honda Civic Si
1994 Honda Civic VX
1994 Honda Civic del Sol S
1994 Honda Civic del Sol Si
1995 Honda Civic CX
1995 Honda Civic DX
1995 Honda Civic EX
1995 Honda Civic LX
1995 Honda Civic Si
1995 Honda Civic VX
1995 Honda Civic del Sol S
1995 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
1996 Honda Civic del Sol Si
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
2000 Honda Civic CX
2000 Honda Civic DX
2000 Honda Civic EX
2000 Honda Civic LX
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
