PREMIUM JIMS PERFORMANCE FORGED PISTON SET — RARE STAGE HIGH-COMP CORE BUILD LOT! 💥

Up for sale is a matching pair (2) of genuine high-performance forged aluminum engine pistons manufactured by JIMS Performance in collaboration with CP Pistons. This race-grade set features the signature under-skirt JIMS and 400A heavy structural relief forgings, alongside precision structural laser-etched laser markings reading CP 71087 along the pin boss bands. The bundle comes complete with both matching tool-steel wrist pins pre-fit into the journals.

This premium high-compression dome-top configuration serves as a direct upgrade or service package for high-performance Harley-Davidson Evolution 1340cc (80ci) Big Twin engine builds utilizing standard or stroker connecting rod configurations. The engine tops carry specialized deep valve pocket reliefs machined onto the crown faces to safely accommodate high-lift performance camshaft profiles without valve-to-piston clearance collision.

✨ FEATURES & DIMENSIONS INCLUDED: ✨

👉 Forged Aluminum Construction: Matching pair of heavy-duty dome top pistons stamped JIMS and 400A inside the internal structural structural skirts.

👉 Laser Etched Tracking Markers: Precision structural build markings stamped CP 71087 on the side internal boss faces.

👉 Tool Steel Wrist Pins: Includes two (2) straight, high-strength tool steel hollow wrist pins pre-fitted cleanly into the center journals.

👉 Micrometer Caliper Verified: The pistons feature clean outer rings and measure out beautifully across the crown face borders using standard dial calipers (as clearly pictured in the reference metrics).

⚠️ BUILDER ASSEMBLY CONDITION REPORT: ⚠️

🛑 Piston Shell Status: The forged crowns and side skirts are structurally sound with no visible stress fractures, There is some detonation pitting, and some scoring along the thrust faces. The ring lands are straight, sharp, and clean of heavy carbon packing.

🛑 Wrist Pin Journals: The inner pin bores are incredibly smooth, round, and free of vertical gouges. The tool-steel wrist pins slide straight and turn smoothly across the bearing channels.

🛑 🚨 CRITICAL FASTENER DISCLOSURE: Please note that while both matching wrist pins are included, this set completely needs the retention wire circlips or spiro-locks. You will need to source a fresh set of appropriate diameter manufacturer retaining clips prior to mounting these to your connecting rods. Never reuse old clips on a performance engine block!