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ApplicationCompatible for Austin Compatible for Mini Cooper S 1275cc A seriesNotice：Big end diameter:45mm/1.772"Pin Type: Floating Pin PistonSpecification*Type: Forged 4340 aircraft chrome moly quality steel for racing*H-beam Conrods Quantity: 4 Pieces as showing in picture*Bolts: Including ARP 2000 5/16" bolts (Note: Extra cost for upgrading to ARP L19 bolts)*The connecting rods all include ARP 2000 bolts, which are rated at 220,000 psi, and the optional ARP L19 material at 260,000 psi is available as an upgraded product.*Advertised Horsepower Rating:200HP/piece*Top acceleration: 9000rpm*package size：28CM*21CM*10CMDimensionCenter to center length:146.05mm/5.75"Big end diameter:45mm/1.772"Small end diameter:20.63mm/0.812"Big end width:26.9mm/1.059"Small end width:22.3mm/0.878"Feature1. Material: Forged SAE 4340 Chrome Moly Steel for the highest strength and durability, dedicated for Racing；2. ARP 2000 bolts ,Optional ARP L19 fasteners available as an upgrade；3. H-Beam design reduces weight without compromising strength；4.Heat-treating & Shot-peened for remained consistent and strong. Shot-peened finish to remove potential for stress risers；5.High precision CNC machined,Precision rod cap alignment dowels；6.Bores finished to +/- .01 mm；7.Balanced to within +/- 1 g per rod；8. Each rod is magnetic particle tested to ensure free of flaws；9.Use X-rayed, sonic tested；10.Custom Service.Note*Professional installation is highly recommended ；*Custom Service:If there's no conrods you need on our site, we would be happy to help determine your requirements and develop a solution with you to satisfy your needs.