Rare Prowler/S.T.D. 107ci Harley Evo-Style Performance Engine – Never Run – Gear Drive – Built by Steg Von Heintz – With Paperwork

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FOR SALE: Rare Prowler/S.T.D. 107ci Evo-Style Performance Engine – Never Run – Gear Drive – Built by Steg Von Heintz – With Paperwork Price: $8,500 OBO Location: Carlsbad CA Shipping: Freight available. I can crate the engine securely; buyer pays shipping (estimated $200–$500 depending on distance). Description: Selling a brand new, never-run 107 cubic inch V-twin built on premium S.T.D. Motorcycles cases with a complete Prowler top end. This engine was expertly assembled by Steg Von Heintz, a legendary motor performance engineer and key figure behind S.T.D. Development. It is fully documented with paperwork and ready for installation in your custom build. This is not a Harley-Davidson engine. It is a purpose-built, high-performance aftermarket motor designed for serious builders who demand strength, precision, and historical value. Priced at $8,500 or best offer, this reflects its never-run condition and collector-grade pedigree. ⸻ Specs and Features: • Displacement: 107ci (approximately 1,753cc) • Cases: S.T.D. Motorcycles, reinforced aftermarket design, stronger than OEM, custom pistons for bathtub chamber • Top End: Prowler billet heads w/ bathtub chamber, ported for max performance and Prowler rocker boxes • Cam Drive: 520 lift cam, gear driven • 10:1 compression raised port exhaust • Finish: Fully polished exterior, no corrosion or wear • Build Details: Professionally assembled by Steg Von Heintz • Documentation: Paperwork included. MSO will be issued to the buyer at time of sale • Performance Potential: Capable of 100+ horsepower with proper tuning (estimate) NEVER RUN, stored in climate controlled environment ⸻ About the Builder: Steg Von Heintz was a pioneering engineer at S.T.D. Development and a driving force in the golden era of custom American V-twins. His engines powered choppers, drag bikes, and performance Harleys, blending unmatched strength with innovative design. This engine embodies his legacy, making it a rare and sought-after piece for enthusiasts. ⸻ • No longer in production; STD’s original operations are limited post-acquisition • American made STD Performance Heads are precision cast at 48,000lb tensile strength from 355 aluminum alloy • Never installed or fired, preserving its pristine condition • Papered and ready for registration • Collector-grade, show-ready, and performance-ready ***SPECIAL FRI/SAT/SUN ONLY! BUYER GETS CARB AND IGNITION W/ MOTOR!*** ⸻ Asking Price: $8,000 or best offer. A fair market price for a motor of this quality, rarity, and condition. Offers considered until July 15, 2025. ⸻ Available to show to serious buyers or ship as needed. Serious inquiries only, please.