{"product_id":"ford-c4-bolt-on-overdrive-unit-2000hp-rated","title":"Ford C4 Bolt-On Overdrive Unit - 2000HP Rated","description":"NoneUnlock true street-and-strip flexibility with our C4 Overdrive Unit - engineered for extreme horsepower builds and everyday driveability. This bolt-on overdrive system transforms your existing C4 transmission into a dual-purpose powerhouse, giving you freeway-friendly cruising AND track-winning gearing at the push of a button.  Why You Need ThisHigh rear-end gears are great for performance… until you hit the freeway. Running 4.30 diff gears at 110 km\/h typically means your engine is screaming at ~3500 RPM.Flip the switch on our overdrive, and you instantly drop to ~1800 RPM at the same speed.Cooler temps. Quieter cruising. Better fuel economy. Longer engine life. Keep your aggressive gears for the track - then cruise home like a stocker.Who It’s ForDrag racersStreet\/strip carsWeekend cruisersAnyone wanting big-gear acceleration AND highway comfort Whether you're hauling down the strip with 1,800+ HP or simply want lower RPMs on long drives, this overdrive unit gives you the best of both worlds.Key BenefitsBolt-On Overdrive for C4 TransmissionsElectronic toggle switch for instant ratio changeUltra-efficient — less than 1 HP loss per 400 HPHandles up to 2000 horsepower20-28% fuel mileage improvementDramatically reduces engine wearCruise faster, lower RPM, less heatPerfect for high-ratio gear setups (4.10, 4.30, 4.","brand":"Speedmaster","offers":[{"title":"Default Title","offer_id":47354336575653,"sku":"PCE724.1002.01","price":2499.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/7896\/9509\/files\/media_b4d52c8f-57e3-428f-abe4-e133a1894470.jpg?v=1776330629","url":"https:\/\/musclecarhq.com.au\/products\/ford-c4-bolt-on-overdrive-unit-2000hp-rated","provider":"Muscle Car HQ","version":"1.0","type":"link"}