Traum G.E. Spec Pistons Honda / Acura K20C/C4 Turbo 65.5mm Bore, 9.8:1 Comp.

• PartNumber:  TRAUM-865MMFT
• Description: Small dome pistons (Set of 4) 
• Pin Size: 22mm
• Bore:86.5mm / Comp. 9.8:1

1. Traum Forged Piston Set – Honda K20C Series (K20C1 / K20C4 / K20C8 Compatible) – Standard or HD Wrist Pin Options

   Description:Upgrade your Honda K20C-series 2.0L engine with premium Traum forged pistons, engineered for reliability in turbocharged applications. These 2618-T6 alloy pistons are optimized for direct injection, high boost, and strong tumble flow — perfect for Civic Type R, Accord 2.0T, Integra Type S, and similar builds.
2. These pistons fit the following engines (shared 86 mm stock bore, ~85.9 mm stroke, and compatible geometry with clyinder honing)
   • K20C1: 2017–2021 Civic Type R (FK8), 2023+ Civic Type R (FL5)
   • K20C4: 2018–2022 Accord 2.0T, select Acura RDX 2.0T
   • K20C8: 2023+ Acura Integra Type S (DE5) – identical internals to K20C1
   • K20C6: Select Acura TLX 2.0T variants
   • K20C3: International turbo Civic/Accord variants
   • K20C2: 2016+ Civic 2.0L NA (LX/EX/Si models) – great for turbo conversions (use lower-compression options for boost)

    

   Traum Piston Options (K20C-Specific)We offer two tiers of Traum pistons for K20C engines, both sharing the same high-quality piston design.
   Piston crown (top surface) often features a carefully shaped bowl or indentationfor turbo efficiency, premium steel rings. Available in common bores: 86.0 mm (stock), 86.5 mm, 87.0 mm, etc., with compression ratios like ~9.8:1 (stock-like) 
3. Option 1: Standard Turbo Pistons (with Standard Wrist Pin)
   • Traum's proven base design, rated at750+ hp by the manufacturer.
   • Includes standard 22 mm wrist pins, premium rings, and locks.
   • Ideal for mild-to-moderate builds: street tunes, big-turbo setups on E85/pump gas, or daily-driven upgrades staying under ~600 hp.
   • Excellent value for reliable power without overkill.

    

   Option 2: Turbo Pistons with Heavy Duty Wrist Pin Upgrade
   • Same piston crown, skirt, and ring package as Option 1 for seamless compatibility.
   • Upgraded heavy-duty wrist pins (thicker wall, higher-strength material) for superior resistance to bending, flex, and extreme side loads under high torque/boost.
   • Traum pistons are rated at750+ hp. but here at Golden Eagle we believe in over building. If you plan on hitting 600+ hp. we would highly recomend the upgraded HD pin option.
   • Recommended for serious builds: 600–900+ hp targets, aggressive launches, high-boost E85 tunes, or track/strip use where pin durability is critical.

    

   Why Choose Traum Pistons from Golden Eagle?
   • Direct fit across turbo K20C variants (K20C1/K20C4/K20C8 share identical piston geometry; K20C2 works well for boosted swaps).
   • Shelf/custom options for quick turnaround; proven in high-power Honda turbo communities.
   • We prioritize safety margins — overbuilding means peace of mind for your build goals.

    

   Important Builder Notes:
   • Match to your rods, deck height, head gasket, and target compression for proper quench and clearance.
   • Always verify piston-to-valve clearance (especially with aftermarket cams like Kelford Stage 2).
   • Professional assembly recommended; pair with ARP head studs, quality gaskets, and proper ring end gaps for boosted applications.
   • Not offering the Outlaw Spec (1000+ hp reinforced crown with pin buttons) for K20C at this time — contact us if you need extreme custom options.
   • Unsure on your variant (e.g., K20C1 vs. K20C4 differences)? Provide year/model/VIN — these work across the family.