Ford 300 Inline-Six Parts & Accessories

Ford 300 Inline-Six Parts & Accessories

The Ford 300 inline-six engine, produced from 1965 to 1996 in displacements including the 240 and 300 cubic inch variants, earned a legendary reputation for low-end torque, near-indestructible reliability, and decades of trouble-free service in Ford F-Series trucks, Econoline vans, and Bronco utility vehicles where steady pulling power and long service life mattered more than peak horsepower. The 4.9-liter version designated the 300 produced 145 horsepower but over 265 pound-feet of torque at very low RPM, making it a natural match for truck applications where loaded lugging ability defined usefulness. The engine's cast iron block and simple pushrod OHV design with minimal electronics through most of its production life contribute to the extraordinary longevity that makes surviving examples still actively working today in farming, ranching, and construction applications. This collection covers maintenance, repair, and performance parts for the Ford 300 inline-six across its full production run in truck and van applications.

Popular Upgrades

Edelbrock and Offenhauser intake manifold upgrades for the Ford 300 inline-six allow fitment of a larger carburetor or throttle body injection conversion that improves throttle response and top-end breathing beyond what the single-barrel factory intake allows. Stainless steel exhaust manifolds from Hooker Headers and custom header fabrication shops improve exhaust flow significantly over the restrictive cast iron factory manifold, unlocking the engine's surprisingly capable upper-RPM breathing for owners who have addressed the intake side as well. High-energy ignition conversion kits replacing the points-style ignition on older 300 engines with electronic trigger systems from Pertronix or MSD eliminate maintenance-intensive point replacement and improve spark quality at all RPM levels.

Performance and Handling

The Ford 300's long stroke and undersquare bore-to-stroke ratio give it exceptional pulling characteristics from very low RPM that make it superior to contemporary V8 alternatives in sustained low-speed high-load truck use despite the horsepower disadvantage. Camshaft upgrades from Crane and Comp Cams designed for the inline-six application improve mid-range and top-end breathing while preserving adequate idle vacuum for power brake operation on stock-style builds. The engine's original carburetor, a single-barrel unit on most applications, benefits from rebuilding with a quality kit including new power valve, accelerator pump, and needle-and-seat assembly that restores clean throttle response lost through years of use and varnish deposits.

What vehicles used the Ford 300 inline-six?

The Ford 300 inline-six was installed in F-100, F-150, F-250, and F-350 pickup trucks from 1965 through 1996, alongside E-Series Econoline vans and the full-size Bronco through its 1991 production year, making it one of the most widely used engines in the history of American truck manufacturing. The related 240 cubic inch inline-six shares the same basic architecture with a shorter stroke and was used in Thunderbird and Galaxie passenger car applications before moving to truck duty, making some internal components interchangeable with the 300 despite the displacement difference. Farming equipment, industrial applications, and marine installations also used the 300 inline-six in significant quantities, creating demand for service parts beyond the automotive aftermarket alone.

What is the compression ratio of the Ford 300 inline-six?

The Ford 300 inline-six used compression ratios ranging from 8.0:1 in late 1970s detuned emissions-era specifications to 9.2:1 in earlier higher-compression variants, with the compression ratio declining progressively from the late 1960s through the mid-1970s as emissions regulations required lower compression for unleaded fuel compatibility. Rebuilding a 300 with performance cylinder head work, decking the block, or using aftermarket pistons can restore higher compression ratios compatible with modern 87-octane regular unleaded fuel on a properly built example. The engine's relatively low factory compression in later production makes it a forgiving candidate for supercharger installation without internal engine modifications.

Why These Parts Fit Right

Parts in this collection are cataloged to the Ford 300 inline-six's full production run from 1965 to 1996, with production year and application-specific fitment notes distinguishing early points-ignition from later electronic ignition variants and carburetor from fuel injection specifications on final production years. Compatibility charts cover both 240 and 300 cubic inch variants where parts are interchangeable. Fast shipping from stocked inventory keeps your Ford 300-powered truck running reliably.

Explore exhaust upgrades for the inline-six in the performance exhaust collection, find suspension solutions in the suspension catalog, or browse air intake systems compatible with carburetor and fuel-injected Ford 300 applications.