My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

COMP Cams 991-1 Dual Valve Spring 1.639" OD 214 lbs Seat Pressure

Manufacturer

Picture for manufacturer COMP Cams

Part Number

991-1
5 reviews
Sale Price

$14.95

1 left at this price

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams 991-1 is a high-performance dual valve spring engineered to deliver superior strength, durability, and valve train stability in demanding engine applications. Manufactured from super clean wire and subjected to extensive quality control testing, this valve spring assembly is designed to handle the extreme stress of high-lift camshafts and high-RPM operation.

Key Specifications:

  • Dual spring design with integrated damper
  • Outer spring outside diameter: 1.650 inches (1.639" O.D.)
  • Outer spring inside diameter: 1.18 inches
  • Inner spring inside diameter: 0.772 inches
  • Installed seat height: 1.950 inches
  • Seat pressure: 214 lbs at 1.950"
  • Spring rate: 640 lbs/in
  • Coil bind height: 1.125 inches

Compatible Components:

  • Compatible retainer: 733-1
  • Compatible spring cup (O.D. locator): 4702-1
  • Compatible shims: 4756
  • Compatible .570" guide diameter spring seat: 4774-1
  • Compatible .630" guide diameter spring seat: 4775-1

The dual spring design creates a stronger valve spring assembly capable of handling the increased valve lift found in extreme stress racing and performance applications. COMP Cams valve springs are precision-engineered to provide the exact spring pressure required at both valve seat and maximum lift positions, ensuring your camshaft performs to its full potential. Sold individually.

Products specifications

Number of Springs

2

Inner Spring Inside Diameter

0.772

Coil Bind Height

1.125

Outer Spring Inside Diameter

1.18

Outer Spring Outside Diameter

1.65

Seat Height

1.95

Seat Pressure

214

Compatible Spring Cup (O.D. Locator)

4702-1

Compatible Shims

4756

Compatible .570" Guide Diameter Spring Seat

4774-1

Compatible .630" Guide Diameter Spring Seat

4775-1

Spring Rate

640

Compatible Retainer

733-1

Damper

Yes

AMAZON ASIN

B00062YHII

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

Yes

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exemption Reason

No impact on pollution output of vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Great company to do business with!

you had what I was looking for

Been looking on amazon for part an don't come up and the web site

Fast shipping, product was excellent .

Thank you ! Easy

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy