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 26-602-7 Thumpr Hydraulic Flat Tappet Camshaft Chrysler Hemi - 243/257 392

(1957-1958 Chrysler 300; 1957-1958 Chrysler Town & Country; 1957-1958 Chrysler Newport; 1957-1958 Chrysler New Yorker; 1957-1958 Chrysler Imperial + 1 more model)

Part of: COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Ford

Other options in this family: COMP Cams 35-600-4 COMP Cams 34-600-5 COMP Cams 20-600-4 COMP Cams 21-600-5 COMP Cams 92-600-5

Manufacturer

Picture for manufacturer COMP Cams

Part Number

26-602-7
6 reviews
Sale Price

$499.95

Estimated ship date Monday, November 23

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 Classic Thumpr 26-602-7 hydraulic flat tappet camshaft is engineered specifically for Chrysler 392 cubic inch Early Hemi V8 engines. This camshaft delivers the signature Thumpr lope and aggressive sound that muscle car enthusiasts love, while providing strong mid-range torque and excellent throttle response for street performance.

Camshaft Specifications:

  • Advertised Duration: 243° intake / 257° exhaust
  • Duration at .050": 207° intake / 221° exhaust
  • Valve Lift: .420" intake / .444" exhaust (with 1.5:1 rocker ratio)
  • Lobe Separation Angle: 110°
  • Hydraulic flat tappet design for reliable street operation
  • Choppy idle with excellent vacuum characteristics

Key Features:

  • Classic Thumpr profile optimized for street performance and sound
  • Engineered specifically for Chrysler 392 Early Hemi engines (1957-1958)
  • Excellent power range from 1,500 to 5,500 RPM
  • Works well with stock or mildly modified cylinder heads
  • Compatible with factory hydraulic lifters and valve train components
  • Ideal for hot street rods, cruisers, and vintage muscle applications

This camshaft is designed for street-driven vehicles with automatic or manual transmissions and works best with 9.0:1 to 10.5:1 compression ratios. The Thumpr series delivers that coveted "race car" idle quality while maintaining good drivability and street manners. Requires break-in procedure following COMP Cams guidelines for hydraulic flat tappet camshafts.

Products specifications

Fits

1957-1958 Chrysler 300; 1957-1958 Chrysler Town & Country; 1957-1958 Chrysler Newport; 1957-1958 Chrysler New Yorker; 1957-1958 Chrysler Imperial; 1957-1958 Chrysler Ford 300

Advertised Exhaust Duration

312

Advertised Intake Duration

295

Basic Operating RPM Range

2,500-6,400

Grind Number

295TH7

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.508

Intake Duration at .050 Inch Lift

243

Exhaust Duration at .050 inch Lift

257

Camshaft Material

Cast Iron

Engine Family

Chrysler 392 HEMI 8 Cylinder (1957-1958)

Camshaft Series

Classic Thumpr

AMAZON ASIN

B005H89VXC

Assembly Lubricant Included

Yes

Lifters Included

No

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

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.

Exhaust Valve Lift

0.495

LOBE SEPARATION

107

Usage

Street/Strip

Beat out carID and they wouldn't honor the same price!

First time I've paid through Amazon for an independent site. Pretty cool

good prices, nice site. Thank you

Site use was easy, and product shipped promptly after ordering. Price was the best I could find, would use this business again.

Ordered a CAI kit and Autoplicity had the lowest price. They're website didn't correctly match my vehicle to the product and it took a few days to ship. They're support was friendly and quick when I emailed them about the delay.

I placed an order 12/5/11 and recieved my order before 10am the following day. Very fast, very easy to use and the best prices I've found on line.

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