{"product_id":"au-4-0l-sohc-ross-racing-forged-piston","title":"AU 4.0L SOHC Ross Racing Forged Piston","description":"\u003ch4\u003eRoss Racing Forged Pistons for AU 4.0L SOHC using BA Rods (22mm gudgeon pin)\u003c\/h4\u003e\n\n\u003cp\u003eThese are a custom piston made by Ross for Spool Imports. If not in stock can take up to 12 weeks \u003c\/p\u003e\n\n\u003cp\u003ePistons are available in:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eCompression Ratio: 8.5:1 and 9.0:1\u003c\/li\u003e\n\n\u003cli\u003eBore Size: +0.5mm and +1mm\u003c\/li\u003e\n\n\u003cli\u003e0.200\" (5mm) Tool steel 52100 gudgeon pins\u003c\/li\u003e\n\n\u003cli\u003ePistons come with rings, gudgeon pins and pin locks\u003c\/li\u003e\n\n\u003cli\u003eForged 2618\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003cp\u003eRated at 1000HP by Ross Racing\u003c\/p\u003e\n\n\u003ch4\u003eRoss Racing Pistons:\u003c\/h4\u003e\n\n\u003cp\u003eAll 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.\u003c\/p\u003e\n\n\u003cp\u003eThis 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.\u003c\/p\u003e","brand":"Ross Racing Pistons","offers":[{"title":"Default Title","offer_id":40347351253073,"sku":"ROS-SPL-AU","price":1650.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2115\/6365\/products\/pistons-ross-ford-au.jpg?v=1683799535","url":"https:\/\/longboostperformance.com\/products\/au-4-0l-sohc-ross-racing-forged-piston","provider":"LongBoost Performance Parts","version":"1.0","type":"link"}