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COMP Cams 12-673-4 Nostalgia Plus Solid Flat Tappet Camshaft 247/254 Duration for Chevrolet 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 + 241 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-673-4
15 reviews
Sale Price

$309.95

In Stock (6)

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Product Details

The COMP Cams Nostalgia Plus 12-673-4 solid flat tappet camshaft delivers authentic vintage performance for Chevrolet small block engines. This cam features 247 degrees of intake duration and 254 degrees of exhaust duration, providing a traditional hot rod idle with strong mid-range torque and top-end power characteristics reminiscent of classic muscle car era camshafts.

Key Features:

  • Solid flat tappet design for durability and adjustability
  • 247°/254° advertised duration (intake/exhaust)
  • Ideal for street/strip applications with manual transmissions
  • Produces aggressive lope idle and strong acceleration
  • Optimized for engines with 9.0:1 to 10.5:1 compression ratio
  • Recommended RPM range: 1,500-6,000 RPM
  • Requires quality valve springs and periodic valve lash adjustment

The Nostalgia Plus series combines proven cam profiles from the golden era of performance with modern manufacturing precision. This camshaft works exceptionally well with street-driven small blocks using headers, dual-plane intake manifolds, and carburetors. Professional installation and break-in procedures are strongly recommended for solid flat tappet camshafts to ensure proper lifter seating and longevity.

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 + 237 more models

Advertised Exhaust Duration

291

Advertised Intake Duration

284

Basic Operating RPM Range

2,300-6,900

Grind Number

N+30-30S

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

Cam and Lifter Kit Upgrade

CL12-673-4

K-Kit Upgrade

K12-673-4

Camshaft Series

Nostalgia Plus

SK-Kit Upgrade

SK12-673-4

Cam Type

Solid Flat Tappet

Usage

Street/Performance

Assembly Lubricant Included

Yes

Lifters Included

No

LOBE SEPARATION

112

Valve Springs Required

Yes

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.

Camshaft Gear Attachment

3-Bolt

AMAZON ASIN

B000RA0DNM

Engine Family

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

Exhaust Duration at .050 inch Lift

254

Part was a perfect fit for my truck. Shipped out fast, and delivery was actually a day earlier than estimated via tracking number.

That was about the fastest transaction I've ever placed. Always a pleasant experience with THmotorsports!

Xxxx

got a specialty tool and exactly what we needed

Great prices and easy website.

Easy ordering process

Absolutely Perfect!!!!!!!!!!!!

I received my order before I got the email with the tracking number. Excellent customer service!

Great pricing on hard to find products. Fast processing and shipping.

I ordered my shifter last night and I got a tracking number today, shipment seems to be speedy and arrive in 3 days with standard shipping.. cheapest price I can find anywhere!

Easy to find and to pay with amazon.

Purchase process an amount of time from purchase, an product being shipped is short an sweet!

Great prices and FAST shipping!! Definitely will buy products here again!

Lowest price on the Internet. Fast shipping.

Great price and quick shipping!

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