Spool XR6 Drag Pro I Beam Connecting Rods and Ross Racing Forged Pistons Optio

  

Spool XR6 Drag Pro I Beam Connecting Rods and Ross Racing Forged Pistons. Spool Drag Pro I Beam Conrods (ARP 2000 7/16 Bolts).

Custom Ross Racing Forged Pistons (Rings, Pins and Locks). These Pistons are custom made for Spool and rated at 1800 hp plus by Ross Racing Pistons. Bore Size: 0.010 / +0.25mm. Total Seal AP Steel Top Ring, Ductile Napier 2nd Ring, High Tension Oil Rings. 0.220 wall H13 Steel Pins.

Compression Ratio: 9.0:1. All of Ross Racing Pistons (since 1985) have been forged from 2618 billet bar stock and have been heat treated and aged to a T61 condition (2618-T61). 2618-T61 is the material that is used when fatigue resistance and durability are of prime importance by all premium racing piston manufacturers. This material has less than 1% silicon particulate content. High silicon content pistons (forged from 4032 or MS75) will not stand up to the most extreme stress placed on many racing pistons.

If a crack starts to form in a high silicon piston it will continue until the piston experiences a catastrophic failure. Simply stated, adding sand to the aluminum only makes it more brittle.

In the rare instance of a 2618-T61 piston cracking, the crack will continue to an area where the stress is not as great and will then stop. Another advantage of 2618-T61 over the high silicon pistons is the ability to keep its shape under extreme pressure and high RPM's. "Skirt Shrinking" is not a problem with ROSS Racing Pistons. Spool Drag Pro I Beam connecting rods are the ultimate high strength direct fit conrod for all Ford XR6 engines.

Increased strength to the beam. Increased strength around the fasteners / bolts. Increased strength around the gudgeon pin.

ARP 2000 fasteners (L19 fasteners are available as an upgrade). High tensile 4340 forged steel.

Dowelled caps for precision alignment. Weight Matched Sets +/- 1 gram. Vacuum degassed to remove impurities. Product images are for description purposes only. Note: We recommend Joe Gibbs Break in Oil for all new engines.

This item is in the category "Vehicle Parts & Accessories\Car & Truck Parts & Accessories\Engines & Engine Parts\Pistons & Rings". The seller is "spool_imports" and is located in this country: AU. This item can be shipped worldwide.

1. Brand: Spool
2. Type: Piston Set
3. Items Included: Piston Rings, Wrist Pin
4. Manufacturer Part Number: ROSS-XR6-DP-FULL
5. Country/Region of Manufacture: United States
6. Performance Part: Yes
7. Material: Aluminium Alloy
8. SKU: ROSS-XR6-DP-FULL