Welcome to Pro-Motive Concepts LLC. We specialize in Auto and Truck parts and accessories. We have a wide selection of air intakes, exhaust, body parts, suspension kits, clutches, ECU upgrades, turbo kits and more in stock for your vehicle! BRAND NEW IN BOX Manley Turbo Tuff I-Beam Connecting Rods and Turbo Tuff 99.5mm Pistons Fits 2004-2021 Subaru Impreza WRX STI 2.5L Turbo (EJ257 Engine) Manley Performance manufactures the finest steel connecting rods in the Sport Compact industry. The Manley Pro Series "I" Beam is forged from 4340 aircraft quality vacuum degassed material. We utilize our proven "Turbo Tuff" design and add 3/8" ARP 2000 cap screws. All rods are properly shot peened after machining and 100% magnafluxed.   Manley Pro Series Turbo Tuff connecting rods are used by the best tuners in and outside of the United States in some of the fastest, high horsepower, heart stopping engines being produced.   On all Manley connecting rods, sets are weight matched to ± 1.5 grams, big and small end bores are final honed to a tolerance of ± .0002", critical bend and twist attributes are held to a minimum, and exacting attention is paid to every detail by our final inspection department; thus rendering a finished product that is second to none. Manley Turbo Tuff Connecting Rod Specs Typical Weight: 613 grams Design: Forged I-Beam Length: 5.137" Pin Size: 0.9055" (23mm) Rod Bolt Size: 3/8" ARP2000 Big End Bore: 2.165" Big End Width: .840" The best aftermarket Subaru piston company just got even better with our new Turbo Tuff lineup targeted specifically for EJ25 engines. By incorporating proven design enhancements from our "Formula-Won" piston forging, we've created the ultimate Subi piston to withstand the rigors of the highest boosted and stressed applications yet still run "quietly" and trouble-free for the daily driver. Like all Manley Subaru pistons, these are made from 2618 alloy, utilize an offset wrist pin design, are skirt coated and include our standard 2.500" x .180" wall premium chrome moly wrist pin (P/N 42346). Premium steel top rings with Napier style second rings and higher tension oil rings (by Total Seal) for ultimate oil control are included with each set along with round wire locks. Manley Turbo Tuff Piston Specs Bore Size: 99.5mm (Standard) Comp. Distance: 1.209" Volume: -22cc Dish 8.5:1 Compression Ratio Typical Weight: 405g NOTE: This item is not C.A.R.B. Legal so it is not for sale or use in California. FREE UPS/FEDEX SHIPPING TO THE LOWER 48 UNITED STATES! All other customers please contact us for a shipping quote Images are for display purposes and may not be application specific  Check out our store for more Subaru performance parts! Be sure to add us to your favorites list!