{"product_id":"supertech-toyota-frs-subaru-brz-86mm-32-5mm-ch-15-5cc-crown-9-5-1-cr-piston-set-of-4-excl-rings","title":"Supertech Crown Pistons Set of 4: Scion FR-S (13-16), Subaru BRZ (13-20) \u0026 Toyota 86 (17-20)","description":"\u003ch3\u003eSupertech Crown Pistons Set of 4\u003c\/h3\u003e\u003cp\u003e2013–2016 Scion FR-S \/ 2013–2020 Subaru BRZ \/ 2017–2020 Toyota 86\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eP4-TFRS-86-CR9.5\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Supertech Crown Pistons Set of 4 is a high-quality upgrade designed specifically for the Scion FR-S (2013–2016), Subaru BRZ (2013–2020), and Toyota 86 (2017–2020). These pistons feature an 86mm bore size with a 32.5mm crown height and a -15.5cc crown volume, engineered to deliver a 9.5:1 compression ratio. Crafted for enthusiasts seeking enhanced engine performance and reliability, this piston set is ideal for those looking to improve their vehicle’s combustion efficiency and durability under spirited driving or mild performance modifications.\u003c\/p\u003e\u003cp\u003eWhether you are upgrading your engine for better power delivery or preparing for moderate tuning, these pistons provide a solid foundation for improved combustion characteristics while maintaining OEM fitment and reliability standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSupertech’s Crown Pistons incorporate advanced design and manufacturing techniques to ensure optimal performance and longevity. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrecision CNC-machined 86mm pistons tailored for the Toyota FR-S, Subaru BRZ, and Toyota 86 engines.\u003c\/li\u003e\n\u003cli\u003e32.5mm crown height with a -15.5cc volume to achieve a 9.5:1 compression ratio, balancing power and engine safety.\u003c\/li\u003e\n\u003cli\u003eCrown-style piston design that enhances combustion efficiency and flame propagation.\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and resistance to high-stress conditions.\u003c\/li\u003e\n\u003cli\u003eCompatible with factory connecting rods and wrist pins for straightforward installation.\u003c\/li\u003e\n\u003cli\u003eSet of four pistons supplied without piston rings, allowing customization based on specific engine builds.\u003c\/li\u003e\n\u003cli\u003eDesigned to maintain OEM clearances and fitment, ensuring compatibility with stock engine components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are forged from high-grade aluminum alloy, providing an excellent strength-to-weight ratio that supports enhanced engine responsiveness and durability. The crown design is optimized to reduce detonation risk while improving combustion chamber efficiency. The precise machining and dimensional accuracy ensure consistent performance and reliable sealing when paired with the appropriate piston rings.\u003c\/p\u003e\u003cp\u003eSupertech’s manufacturing process includes rigorous quality control to deliver pistons that meet or exceed OEM specifications, making them suitable for both daily driving and performance applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Supertech Crown Pistons are designed as direct replacements for the factory pistons in the specified vehicles. Installation requires standard engine assembly procedures and is best performed by experienced technicians or engine builders. These pistons fit the stock bore size of 86mm and maintain OEM piston-to-cylinder wall clearances.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNo modifications to the engine block or connecting rods are necessary.\u003c\/li\u003e\n\u003cli\u003ePiston rings are not included and must be sourced separately to match your engine build.\u003c\/li\u003e\n\u003cli\u003eProfessional balancing and proper ring installation are recommended to ensure optimal engine performance and longevity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhat’s Included\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of 4 Supertech Crown Pistons (86mm bore, 32.5mm crown height, -15.5cc volume)\u003c\/li\u003e\n\u003cli\u003eNote: Piston rings are not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is ideal for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEnthusiasts upgrading their Scion FR-S, Subaru BRZ, or Toyota 86 engines for improved performance and reliability.\u003c\/li\u003e\n\u003cli\u003eEngine builders seeking forged pistons with a moderate compression ratio for street and light track use.\u003c\/li\u003e\n\u003cli\u003eThose performing engine rebuilds or upgrades requiring OEM-compatible pistons with enhanced durability.\u003c\/li\u003e\n\u003cli\u003eDrivers aiming to support mild to moderate power increases without compromising engine longevity.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supertech","offers":[{"title":"Default Title","offer_id":51255223124264,"sku":"P4-TFRS-86-CR9.5","price":913.72,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/9744\/0808\/files\/0000077_6455374668387891ff97a2efcade451f_815501b1-1260-4ab6-8a3c-5c9e27ec6d10.webp?v=1771639657","url":"https:\/\/fastscions.com\/products\/supertech-toyota-frs-subaru-brz-86mm-32-5mm-ch-15-5cc-crown-9-5-1-cr-piston-set-of-4-excl-rings","provider":"FastScions","version":"1.0","type":"link"}