{"product_id":"wilwood-caliper-forged-superlite-1-12in-pistons-81in-disc","title":"Wilwood Caliper-Forged Superlite 1.12in Pistons .81in Disc","description":"\u003ch4\u003eWilwood Forged Superlite FSLI Caliper with Symmetrical 1.12-Inch Pistons for Short Track and Road Race\u003c\/h4\u003e\n\u003cp\u003eThe Wilwood WIL120-11125 is a Forged Superlite FSLI single caliper with dual symmetrical 1.12-inch pistons and a 0.81-inch disc width capacity. The Forged Superlite series is the benchmark in short track, late model, modified, and open wheel competition, and has earned equal prominence in road race, off-road, rally, and sport driving applications. The FSLI designation marks the latest evolution of this caliper family: Wilwood redesigned it with internal fluid ports that eliminate the external fluid crossover tube, removing a potential failure point from the caliper body. The crossover tube has been replaced by two additional bleed screw assemblies, which allows all symmetrical piston bore models in this series to be mounted in either a right or left, leading or trailing position without compromising fluid routing. The WIL120-11125 is sold as a single caliper and should be ordered in pairs for most axle applications.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInternal fluid ports eliminate the external crossover tube for a cleaner, more durable design\u003c\/li\u003e\n\u003cli\u003eTwo bleed screw assemblies allow leading or trailing, left or right mounting in any position\u003c\/li\u003e\n\u003cli\u003eSymmetrical 1.12-inch piston bores for even clamping across the pad surface\u003c\/li\u003e\n\u003cli\u003eFits 0.81-inch wide rotors\u003c\/li\u003e\n\u003cli\u003eForged billet aluminum caliper body for maximum strength-to-weight ratio\u003c\/li\u003e\n\u003cli\u003eBenchmark caliper for short track, late model, open wheel, road race, rally, and street performance\u003c\/li\u003e\n\u003cli\u003eSold as a single caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e120-11125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eWIL120-11125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Bore\u003c\/td\u003e\n\u003ctd\u003e1.12 in (symmetrical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor Width Capacity\u003c\/td\u003e\n\u003ctd\u003e0.81 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFluid Port Design\u003c\/td\u003e\n\u003ctd\u003eInternal (FSLI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Orientation\u003c\/td\u003e\n\u003ctd\u003eLeft or Right, Leading or Trailing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBleed Screws\u003c\/td\u003e\n\u003ctd\u003e2 (replaces crossover tube)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCaliper Material\u003c\/td\u003e\n\u003ctd\u003eForged Billet Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e1 caliper (order 2 for axle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Wilwood WIL120-11125 Forged Superlite FSLI caliper\u003c\/li\u003e\n\u003cli\u003eBleed screws installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wilwood-caliper-forged-superlite-1-25in-pistons-0-81in-disc\" title=\"Wilwood 120-11126 Forged Superlite Caliper 1.25in Pistons\"\u003eWilwood 120-11126 — Forged Superlite FSLI 1.25in Pistons, 0.81in Disc\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wilwood-caliper-forged-superlite-1-38in-pistons-81in-disc\" title=\"Wilwood 120-11128 Forged Superlite Caliper 1.38in Pistons\"\u003eWilwood 120-11128 — Forged Superlite FSLI 1.38in Pistons, 0.81in Disc\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wilwood-wil220-7496-bleed-screw-1-4-28-black\" title=\"Wilwood 220-7496 Bleed Screw 1\/4-28 Black\"\u003eWilwood WIL220-7496 — 1\/4-28 Black Bleed Screw\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAbout Wilwood\u003c\/h4\u003e\n\u003cp\u003eWilwood Engineering has been designing and manufacturing high-performance brake components in Camarillo, California since 1977. Every Wilwood caliper is machined from premium forged billet aluminum and validated through rigorous motorsports testing. Wilwood products are trusted by professional teams across SCCA, NASA, and multiple short track and oval disciplines.\u003c\/p\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the Wilwood WIL120-11125?\u003c\/strong\u003e\n\u003cp\u003eThe Wilwood WIL120-11125 is a Forged Superlite FSLI single caliper with dual symmetrical 1.12-inch pistons and a 0.81-inch rotor width capacity. It features internal fluid ports that eliminate the external crossover tube, allowing left or right, leading or trailing mounting with two bleed screw positions.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat does FSLI mean on this caliper?\u003c\/strong\u003e\n\u003cp\u003eFSLI stands for Forged Superlite with Internal fluid transfer ports. Wilwood redesigned the classic Superlite caliper body to route brake fluid internally between the two piston bores, eliminating the external crossover tube that was a potential leak or damage point on earlier Superlite models.\u003c\/p\u003e\n\n\u003cstrong\u003eCan this caliper be mounted on either side of the axle?\u003c\/strong\u003e\n\u003cp\u003eYes. The symmetrical piston bore and dual bleed screw design allows the WIL120-11125 to be mounted in a leading or trailing position on either the left or right side of the axle without rerouting fluid lines.\u003c\/p\u003e\n\n\u003cstrong\u003eIs this caliper sold as a pair?\u003c\/strong\u003e\n\u003cp\u003eNo. The WIL120-11125 is sold as a single caliper. Order two for a complete axle application, and confirm rotor width and bracket clearance for your specific application before ordering.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat rotor width does this caliper fit?\u003c\/strong\u003e\n\u003cp\u003eThe WIL120-11125 is designed for 0.81-inch wide rotors. Using a rotor of a different width may result in incorrect pad-to-rotor contact and uneven wear.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat thread size are the bleed screws on this caliper?\u003c\/strong\u003e\n\u003cp\u003eWilwood Superlite FSLI calipers use 1\/4-28 threaded bleed ports. Replacement bleed screws are available separately as Wilwood part number 220-7496.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat piston material are used in this caliper?\u003c\/strong\u003e\n\u003cp\u003eWilwood uses phenolic composite pistons in its Superlite line. Phenolic pistons provide excellent thermal insulation to protect brake fluid from heat fade while maintaining dimensional stability under load.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat brake fluid is recommended for this caliper?\u003c\/strong\u003e\n\u003cp\u003eWilwood recommends its own EXP 600 Plus or Hi-Temp 570 brake fluid for racing applications, and a DOT 4 or DOT 5.1 fluid meeting or exceeding FMVSS 116 for street use. Never mix DOT 5 silicone fluid with glycol-based fluids in the same system.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eConfirm rotor width (0.81 in) and bracket offset before ordering. Fabricate or source the appropriate caliper mounting bracket for your application.\u003c\/li\u003e\n\u003cli\u003eMount the caliper bracket to the upright or knuckle and torque to specification.\u003c\/li\u003e\n\u003cli\u003eInstall brake pads into the caliper and position the caliper over the rotor.\u003c\/li\u003e\n\u003cli\u003eTorque caliper mounting bolts to the bracket specification. Verify even pad-to-rotor clearance on both sides.\u003c\/li\u003e\n\u003cli\u003eConnect the brake line to the inlet port. Torque the banjo bolt or line fitting to specification with a new copper washer.\u003c\/li\u003e\n\u003cli\u003eBleed the caliper using the bleed screw on the outboard side, then verify a firm pedal with no spongy feel before test driving.\u003c\/li\u003e\n\u003cli\u003eBed in pads per manufacturer instructions before full-load use.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":39921325965391,"sku":"WIL120-11125","price":245.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/WIL120-11125-Wilwood-Wilwood-Caliper-Forged-Superlite-1_12in-Pistons-_81in-Disc-Brake-Calipers-Perf.jpg?v=1714610178","url":"https:\/\/www.blackopsautoworks.com\/products\/wilwood-caliper-forged-superlite-1-12in-pistons-81in-disc","provider":"Black Ops Auto Works","version":"1.0","type":"link"}