Herrod Underdrive Pulley System
The Herrod Motorsport Under-Drive Pulley system is specifically designed & engineered for the 5.4 Litre Ford modular engine (not the 4.6 Litre Mustang engine) with correct counterweight to maintain drive-train harmonics for the 5.4 litre engine. These aftermarket pulleys are 25% under-driven to reduce drag from engine accessories allowing your engine to spin up freely and quickly.
The Herrod Motorsport Under-Drive Pulley system is S.F.I – 18.1 ( Safety Federation Incorporated ) approved and stamped for Motorsport use, and has been safety tested up to 12,500 R.P.M. Each Pulley system is individually Serial Numbered.
Feeling the benefits of the Herrod Motorsport Under-Drive Pulley system is all in the throttle response with 25% reduced drag on your accessories providing far superior acceleration.
Each Herrod Motorsport 25% Under-Drive Pulley kit comes supplied with an SFI-18.1 approved Crankshaft pulley and matching water-pump pulley.
Supplied: $410 (plus P&H)
Supplied & Fitted: $735