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COMP Cams K12-673-4 Nostalgia Plus Hydraulic Flat Tappet Camshaft K-Kit for Chevy Small Block

(GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91 + 239 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

K12-673-4
6 reviews
Sale Price

$796.95

1 left at this price

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Usually delivered within 2 days

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Product Details

The COMP Cams K12-673-4 Nostalgia Plus K-Kit delivers classic performance for Chevrolet Small Block engines with a 247/254 duration solid flat tappet camshaft profile. This complete engine upgrade kit is designed for street performance applications seeking a traditional hot rod sound and increased mid-range torque.

Complete K-Kit Includes Everything You Need:

  • Nostalgia Plus solid flat tappet camshaft with 247°/254° advertised duration
  • Matching flat tappet lifters engineered for the cam profile
  • High-performance valve springs with proper seat pressure and tension
  • Precision steel retainers for reliable valve train control
  • Valve locks (keepers) for secure retainer installation
  • Valve stem seals to prevent oil consumption
  • Timing chain set for accurate cam timing
  • Assembly lube specifically formulated for flat tappet cam break-in
  • Installation instructions and COMP Cams decals

Performance Characteristics:

The Nostalgia Plus cam series provides a smooth idle with moderate lope, excellent throttle response, and strong power delivery from 1,500 to 5,500 RPM. The slightly longer exhaust duration (254° vs 247° intake) helps scavenge exhaust gases and build low-end torque. This profile works well with stock or mildly modified cylinder heads, standard compression ratios of 9.0:1 to 10.5:1, and both manual and automatic transmissions.

Application Notes:

Designed specifically for Chevrolet Small Block V8 engines (262-400 cubic inches). The K-Kit format ensures all valve train components are properly matched and tested together, eliminating guesswork and compatibility concerns. The solid flat tappet design requires periodic valve lash adjustment but provides excellent durability and performance in traditional pushrod applications.

This kit is ideal for restorers, street rodders, and enthusiasts building period-correct muscle car engines or seeking authentic vintage performance with modern manufacturing quality.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91, C3500 1979-86, 1988-95, K2500 Suburban 1979-86, 1992-95, K3500 1979-86, 1988-95, C15/C1500 Pickup 1967-74 + 235 more models

Advertised Exhaust Duration

291

Advertised Intake Duration

284

Basic Operating RPM Range

2,300-6,900

Lifter Type

Solid Flat Tappet

Exhaust Valve Lift

0.498

Intake Valve Lift

0.504

Intake Duration at .050 Inch Lift

247

Camshaft Material

Cast Iron

Kit Type

K-Kit - Complete Kit

Camshaft Series

Nostalgia Plus

Cam Type

Solid Flat Tappet

AMAZON ASIN

B001R99R7A

Usage

Street/Performance

Assembly Lubricant Included

Yes

LOBE SEPARATION

112

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?

No

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. 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.

Gaskets Included

No

Camshaft Gear Attachment

3-Bolt

Lifters Included

Yes

Valve Springs Included

Yes

Engine Family

Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)

Exhaust Duration at .050 inch Lift

254

Good price on power steering hose. Hose fit perfectly and does not leak. Was pleased that crush washers came with the hose. Hose O.D. is slightly smaller than stock, but not a big deal.

It was fast and efficient.

DISCOUNT OFF 35% COULDN'T BE APPLIED

Very satisfied! My intake shipped on Friday and I received it on Tuesday. Not only super fast shipping, but a great deal to boot!

Order for Borla exhaust filled quickly, correctly and shipped safely. Previously I had to cancel an order for the same item at a competitor who gave nothing but excuses for non-shipment of item. And at a higher price! Autoplicity had best price, service, and followthru on purchase. Will be a returning customer without a doubt.

Very good customer service asked about a lot of different springs and parts for my Mazdaspeed 3.

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