XDF Oil Filter Adapter for Small & Big Block Chevy V8s — 13/16-16 Thread, Fits 3952301-Style Housings

The XDF Oil Filter Adapter 3952301 converts factory-style oil ports to a spin-on bypass filter mount for Small Block and Big Block Chevy V8 engines.

This machined adapter replaces hard-to-find original fittings and lets you install modern spin-on oil filters on a wide range of Chevy engines, including SBC and BBC applications. It is built to the standard 13/16-16 thread size and engineered to mate with the oil gallery port left by many 3952301-style housings. The design supports routine maintenance, simplifies filter changes, and can make sourcing replacement filters easier for classic and updated Chevy V8s.

Which Chevy engines is this XDF adapter compatible with?

The adapter fits both Small Block and Big Block Chevy V8s that used the 3952301-style oil filter housing. It is suitable for many popular displacements across decades of Chevrolet engines.

• Small Block Chevy: 283, 305, 307, 327, 350, 383
• Big Block Chevy: 396, 402, 400, 427, 454
• Common classic and crate engine applications where the 3952301 port is present

How does the XDF adapter work with spin-on bypass filters?

The adapter provides the correct 13/16-16 threaded interface to accept standard spin-on bypass oil filters. It redirects oil flow from the engine gallery into the filter and back out to the block using the factory feed port.

• Thread size: 13/16-16 standard spin-on filter thread
• Direct mating to 3952301-type oil gallery ports
• Allows use of modern, readily available spin-on bypass filters

What are the installation considerations and parts needed?

Installation is straightforward for DIY mechanics or professional shops familiar with Chevy oil systems. You should inspect sealing surfaces, use compatible gaskets or thread sealant as required, and confirm clearance for the chosen filter style and size.

• Verify the engine has the 3952301-style oil housing or port
• Use appropriate gasket or thread sealant per engine build practices
• Check filter clearance near accessories and frame rails

Will this adapter change oil pressure or flow characteristics?

When installed correctly, the adapter maintains the engine's oil routing while allowing a spin-on bypass filter; it is not designed to alter pressure significantly. Use OEM or equivalent filters and monitor oil pressure after installation to confirm normal operation.

• Designed to preserve factory oil galleries and oil flow paths
• Use recommended oil viscosity and quality for your engine
• Confirm normal pressure readings after initial startup

Who is this for: This XDF oil filter adapter is ideal for owners and restorers of classic Chevrolet V8s who want the convenience and parts availability of spin-on bypass filters. It suits DIY enthusiasts updating older engines, performance builders fitting modern service parts, and repair shops that need a reliable conversion for SBC and BBC blocks fitted with the 3952301-style oil port. If you require a straightforward, threaded adapter that accepts standard 13/16-16 spin-on filters for 283–454 Chevy engines, this product simplifies maintenance without extensive modifications.