We do not stock this item.

It will be assembled by the manufacturer and ship directly from them to your door.

Through an incredible, limited-time offer, Hardcore Horsepower can now offer a BRAND NEW, FULLY ASSEMBLED, ULTRA-AFFORDABLE World Products S/R or S/R Torquer 23-degree SB Chevy iron head! S/R and S/R Torquer heads are fully 50-State Emissions Legal too!

These 23-degree performance iron heads are the most affordable way to improve power and increase torque on a micro budget. These are 100% NEW CNC machined with all accessory bolt holes properly located and they feature an improved 170cc intake port and improved combustion chamber shape to keep velocities high for an added "ram" effect of the intake charge. The S/R Torquers include 2.02" & 1.60" stainless steel valves and work best on 350ci or larger engines. The S/R heads feature 1.94" & 1.50" which are recommended for 327ci and smaller engines, or low-rpm, hi-torque engines meant for heavy towing, RV's, and pleasure boats.

Hardcore Horsepower offers only the best components available nationwide to help you build the best Mouse.

Kit contents:

  • 1 Each (Single Head) BRAND NEW fully-assembled cast iron World Products "S/R" 23-degree SBC head (THE HEADS ARE NOT 2NDs, NOT BLEMS! THEY ARE 100% BRAND NEW)
  • 67cc combustion chambers
  • 170cc intake port
  • Straight spark plugs
  • Stainless steel 1.940" x 1.500" valves standard w/ "S/R" heads
  • 3-angle valve job with radius exhaust seat
  • Hydraulic flat-tappet valve springs (1.250"-dia, .510" max lift, 110 lbs. @ 1.700" seat pressure)
  • 1.250" steel retainers
  • New locks & seals
  • Extra thick deck surfaces to resist warpage

  • Fits 1987-up intake w/ 72° angle intake bolts

    NOTE: 

    ROCKER ARM STUDS and PUSHROD GUIDE PLATES ARE NOT INCLUDED.

    *THESE HEADS FEATURE SLOTTED PUSHROD HOLES. DO NOT USE GUIDEPLATES OR SELF-ALIGNING ROCKERS ON THESE HEADS! Contact us if you need more info.

    These are just partial listings. Any head combo can be custom-tailored to fit your needs. From mild-to-wild, we can put together a package to make your ride scream!

    We install and tune! Purchase this item and receive in-house installation, initial set-up, and tuning at Hardcore Horsepower, LLC!


    TN residents add 9.25% sales tax.


    Hardcore Horsepower, LLC Warranty:
    All products used in Hardcore Horsepower engines are protected against defects in workmanship and materials by their original manufacturer’s warranties. See Hardcore Horsepower Store for more warranty details.
     

    We offer Ground shipping to the 48 states only on this item.

    Feel free to call for more info or to customize your kit accordingly.

    International Shipping may be available for extra cost. Please provide a complete street address for quote.

    Photos shown are representational only.

    Actual item may differ.


    Hardcore Horsepower, LLC
    Franklin, TN
    615/595-0060
    10am-6pm Monday thru Friday
    USA Central Time

    Check out all of the other great deals available in our eBay Store!!!

    We Make It Go Fast!!!

    We do not stock this item.

    It will be assembled by the manufacturer and ship directly from them to your door.


WARNING
Some of the products sold in this store
contain/may contain chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm.
California Health and Safety Code Section 25249.6