Home - Return to Previous Page
Click on image to zoom

Modular Head Shop 5.0L Coyote Lightweight High Compression N/A Rotating Assembly - 12.5:1 Compression

Boss 302 Crankshaft, K1 Rods, JE Pistons / Rings, King XP Series Bearings
Pricing: $2,139.00

Customize Your Item

- Select Bore -
 * required
- Select Wrist Pins -
 * required
- Balance Rotating Assembly? -
 * required
Free Shipping!


  • FRPP Boss 302 Forged Crankshaft
  • K1 Technologies Forged 4340 H-Beam Rods with 7/16" ARP 2000 Rod Bolts 
  • JE FSR Forged Pistons 
    • Lightweight, Strutted Forging w/ Valve Reliefs 
    • 10.8:1 - 11.3cc Dome for 12.5:1 - 13.0:1 Compression 
    • JE 1.0mm x 1.2mm x 3mm Ring Set - Steel Top, Napier 2nd 
    • Lightweight 5115 Alloy Wrist Pin - Ultra Light Tool Steel Pins available
  • King XP Series Main Bearings 
  • King XP Series Rod Bearings

Compression Ratios Combos:
Standard Deck - Approx .008" Piston to deck clearance,
.040" x 3.700" Head Gasket = 12.5:1 
Zero Deck,  
.040" x 3.700" Head Gasket = 12.7:1 
Standard Deck - Approx .008" Piston to deck clearance, 
.030" x 3.700" Head Gasket = 12.8:1 
Zero Deck,  
.030" x 3.700" Head Gasket = 13.1:1 
This Rotating Assembly is designed specifically for N/A applications, where maximum power and RPM is wanted. We use the lightest off the shelf components available for this reason. The K1 Rods are very light for their strength, and are capable of handling extreme RPM. These come standard with 7/16" ARP 2000 Rod Bolts. The JE Pistons are a strutted, lightweight design and come with lightweight wrist pins and a lightweight piston ring stack. The standard wrist pins that come in this kit are a 5115 Alloy, similar in strength to 8620 or 4130 Steels, and these weigh approx. 98 grams. We have an optional upgrade for ultra-light 52100 Tool Steel, .120" Wirst Pins that weigh only 81 grams. 
Approx Bobweight with Standard Wrist Pins - 1640g 
Approx Bobweight with .120" Wall Tool Steel Pins - 1620g
*Internal Balancing Available
   - Rods and Pistons weight matched to +/- 0.1g
   - Crankshaft Balanced to +/- 0.2g 


Shipping Information

  • Item Requires Shipping
  • 85.0 lbs.
  • W24.0000” x H24.0000” x L36.0000”
  • Free Shipping!

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.