Manley H-Beam 'Tuff Plus' connecting rods for the Mazdaspeed 3 MZR 2.3L DISI Turbo offer a higher-capacity rod option finished to tight tolerances and supplied with 3/8" ARP 625+ bolts. The product listing cites an approximate horsepower rating near 950, positioning these rods for heavily modified or race-level builds. They combine H-Beam geometry with Manley’s quality control and attention to detail for demanding applications.
Manley Mazdaspeed 3 MZR 2.3L DISI Turbo H Tuff Plus Connecting Rod Set