H-Tuff Series Connecting Rods for EJ20 and EJ25 Engines by Manley Performance Manley "H-Tuff" connecting rods are manufactured from 4340 forgings to the same exacting standards developed and approved by our original equipment customers. There is a vast difference in quality between a Manley "H-Tuff" connecting rods and the other inexpensive H-Beams on the market. There is a vast difference in quality between a Manley "H-Tuff" connecting rods and the other inexpensive H-Beams on the market. They are equipped with heavier beams for high boost applications. Weight matched to +/- 1.5 grams. Perfectly round big and small ends. Bend and twist is tightly controlled. Comes standard with 3/8" ARP 2000 bolts. ARP 625+ Bolts are included in the H-Tuff Plus Kit. Features H-Tuff design incorporates wider beam and increased cross-sectional thickness in critical areas H-Tuff delivers a stronger rod with greater safety margin to handle high-powered applications The finest quality and tightest tolerances customers expect from every set of Manley rods High Quality ARP 2000 bolts standard with every set of Manley connecting rods ARP 625+ bolts upgrade available when you choose the H-Tuff Plus PLEASE NOTE Due to the intended usage of the products sold, they are sold WITHOUT WARRANTY OR ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR THE INTENDED PURPOSE. Applications 2002 - 2014 Subaru Impreza WRX 2004 - 2014 Subaru Impreza WRX STi 2015 - 2021 Subaru WRX STi 2005 - 2012 Subaru Legacy GT 2004 - 2013 Subaru Forester XT What's In The Box? 1 - H-Tuff Connecting Rod Set 1 - Set of ARP Bolts Warranty Information Manual/Instructions Warranty No Warranties are offered by Manley Performance due to the intended use of their products.