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🛒 Product Overview
212cc Hemi Predator Performance Kit “Racer .308”212cc Hemi Predator Performance Kit “Racer .308”
- The Stage 4: 212cc Hemi Predator Performance Kit “Racer .308” is a high-performance, modified racing upgrade package engineered for builders seeking strong high-RPM power delivery with reliable valvetrain stability on Hemi Predator 212cc engines.
This kit is built around a .308 high-lift performance camshaft , designed to significantly improve airflow, extend valve duration, and enhance mid-to-high RPM power output. The cam profile is optimized for modified Hemi applications, delivering strong acceleration and improved top-end performance in competitive kart and small engine racing setups.
To ensure stable and controlled operation at elevated RPM levels, the kit includes 26lb performance valve springs , providing consistent valve control and reducing the risk of valve float under load. This configuration is engineered for a balanced high-RPM setup, prioritizing both performance and durability rather than extreme peak RPM operation.
The rotating assembly is reinforced with a 3.308” performance connecting rod and bearing set , improving bottom-end strength and crankshaft stability under increased engine stress. This upgrade ensures reliable operation when paired with the aggressive camshaft profile.
A 70mm flat-top performance piston kit (with rings and wrist pin) is included to increase compression ratio, resulting in improved throttle response, stronger torque output, and enhanced combustion efficiency across the RPM range.
For engine reliability and sealing integrity, this kit includes a complete gasket and seal package featuring a Hemi valve cover gasket, intake and exhaust gaskets, crankcase gasket, crankshaft oil seals, and a 70mm head gasket with locating tabs , ensuring a full rebuild-level sealing solution.
Ignition performance is supported by a F7TC high-performance spark plug , designed for stable combustion under higher compression and sustained high-RPM operation.
To improve throttle response and engine acceleration, the kit includes a lightweight machined magnetic flywheel , reducing rotational mass while maintaining durability for performance use. A magnetic drain plug set (M10x1.25) is also included to capture metal debris and help extend engine life during racing conditions.
Fitment
- Designed for 212cc Hemi Predator engines
Camshaft Specifications (.308 Hemi Performance Profile)
- Recommended Class: Modified Racing
- Target RPM Range: ~7800–8200 RPM
- Intake Lift: .308”
- Exhaust Lift: .308”
- Duration @ .050” (Intake): 244.2°
- Duration @ .050” (Exhaust): 244.6°
- Cam Centerline (Intake): 108° ATDC
- Cam Centerline (Exhaust): 108° BTDC
- Valve Spring Pressure: 26 lb (IN / EX)
- Valve Lash (IN / EX): .003”
- Ignition Timing Recommendation: 34° BTDC
Cam Timing Events
- Intake Open: 53.5° BTDC
- Intake Close: 91.0° ABDC
- Exhaust Open: 91.0° BBDC
- Exhaust Close: 55.1° ATDC
- Valve Lift: .308” / .308”
This camshaft is designed for strong mid-to-high RPM performance while maintaining stability and controllability when paired with 26lb valve springs.
Connecting Rod Specifications
- Length: 3.308”
- Recommended Torque: 150+ in/lbs
- Installation Tool: 1/4” 12-point socket recommended
The upgraded connecting rod improves bottom-end durability and crankshaft stability, ensuring reliable operation under modified camshaft loads.
Performance SummaryThis Stage 4 “Racer .308” kit delivers
- Strong high-RPM power delivery with stable operation
- Improved airflow and extended cam duration performance
- Increased compression for better throttle response
- Reinforced bottom-end durability for racing conditions
- Lightweight flywheel for faster engine acceleration
- Complete sealing system for full rebuild reliability
💳 Payment
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- Immediate payment is required after checkout.
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📦 Shipping
- Processing Time: 1-3 Business Days
- Standard Shipping: 15-26 Days via Airmail
- Express Shipping: 3-10 Business Days
🔁 Return Policy
- Returns accepted within 30 days
- Item must be unused and in original packaging
- Buyer pays return shipping unless item is defective
📩 Contact Us
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💡 Why Choose BI74
- Professionally tested and sourced parts
- Responsive customer support
- Fast order processing
On Oct 10, 2026 at 00:06:18 PDT, seller added the following information:
![.308 Camshaft Billet Flywheel 3.308\](img-large/g/rcQAAeSwcLlqOPhM/s-l1600/-308-Camshaft-Billet-Flywheel-3-308-Connecting-Rod.jpg ".308 Camshaft Billet Flywheel 3.308\")
