GReddy OX-01 Performance Oil Filter - 3/4-16 UNF | 65mm Diameter | 75mm Height (13901101)

Upgrade your engine's oil filtration with the GReddy OX-01 performance oil filter. Featuring a 3/4-16 UNF thread, 65mm diameter, and 75mm height, the OX-01 is a high-quality performance replacement filter for Honda, Acura, Subaru, and other applications using the 3/4-16 UNF thread standard — delivering GReddy's proven filtration quality in a direct-fit form factor.

Key Features:

• 3/4-16 UNF thread
• 65mm diameter
• 75mm height
• Performance filtration media
• Anti-drain back valve
• Direct replacement for factory oil filter
• Universal fitment for 3/4-16 UNF applications
• GReddy quality and engineering

Performance Benefits:

• Quality Filtration: GReddy performance media captures contaminants while maintaining oil flow
• Anti-Drain Back: Prevents oil drain-back on startup for immediate lubrication
• Direct Fit: 3/4-16 UNF thread fits a wide range of Honda, Acura, and Subaru applications
• Reliable Sealing: Quality gasket ensures leak-free installation
• GReddy Heritage: Trusted Japanese performance brand

Specifications:

• Brand: GReddy
• Part Number: 13901101
• Model: OX-01
• Thread: 3/4-16 UNF
• Diameter: 65mm
• Height: 75mm
• Weight: 0.6 lbs
• Barcode: 13901101

Fitment Information:

• Thread: 3/4-16 UNF — universal fitment for all vehicles using this thread standard
• Honda/Acura applications: Civic (B-series, K-series), Integra (B-series), Accord (F-series, K-series), CR-V (K-series), S2000 (F20C/F22C), NSX (C-series), and other Honda/Acura models with 3/4-16 UNF oil filter thread
• Subaru applications: WRX, STI, Forester, Legacy, and other Subaru models with 3/4-16 UNF oil filter thread
• Other applications: Various other vehicles using 3/4-16 UNF oil filter thread
• Note: Verify your vehicle uses 3/4-16 UNF oil filter thread before ordering — consult your service manual or parts database
• Note: Verify filter dimensions (65mm diameter, 75mm height) provide adequate clearance in your engine bay

What's Included:

• GReddy OX-01 oil filter (13901101)
• Note: Engine oil sold separately
• Note: Lightly lubricate the filter gasket with fresh oil before installation

Installation Notes:

• Warm engine slightly before oil change to reduce oil viscosity
• Drain engine oil completely
• Remove old oil filter
• Lightly lubricate new filter gasket with fresh engine oil
• Thread GReddy OX-01 onto filter mount by hand until gasket contacts sealing surface
• Tighten an additional 3/4 turn by hand — do not use a filter wrench to tighten
• Refill with fresh engine oil to correct level
• Start engine and check for leaks around filter gasket
• Recheck oil level after engine has run briefly

3/4-16 UNF Thread — Wide Platform Coverage:

The 3/4-16 UNF (Unified National Fine) thread is one of the most common oil filter thread standards in the performance automotive world, used extensively by Honda and Acura across their B-series, K-series, F-series, H-series, and C-series engines. It is also used by Subaru on many of their EJ and FA/FB series engines, as well as by other manufacturers. This broad compatibility makes the GReddy OX-01 a versatile choice for shops and enthusiasts who work across multiple Honda, Acura, and Subaru platforms. Always verify your specific vehicle's oil filter thread before ordering — while 3/4-16 UNF is common, some applications use different thread standards.

Filter Dimensions — 65mm x 75mm:

The OX-01's 65mm diameter and 75mm height are important fitment considerations beyond just the thread size. In some engine bays, particularly on modified vehicles with aftermarket components, filter clearance can be tight. Verify that a 65mm x 75mm filter has adequate clearance in your specific engine bay before ordering. If clearance is limited, a shorter filter may be required. Conversely, if your engine bay has ample space, a taller filter provides greater filter media surface area for improved filtration capacity and longer service intervals.

Anti-Drain Back Valve:

The OX-01 includes an anti-drain back valve that prevents oil from draining out of the filter when the engine is shut off. Without this valve, oil drains back from the filter into the oil pan, leaving the filter empty. On the next startup, there is a brief period before oil pressure builds and the filter refills — during which the engine runs with reduced lubrication. The anti-drain back valve keeps the filter primed with oil, ensuring immediate oil pressure and lubrication on startup. This is particularly important for performance engines with tight bearing clearances where even brief oil starvation can cause accelerated wear.

Oil Change Intervals:

Replace the GReddy OX-01 at every oil change. For performance and modified engines, more frequent oil changes are recommended — typically every 5,000 km or less depending on driving conditions and oil type. Track use, high-boost operation, and extended high-RPM driving all accelerate oil degradation and contamination, requiring more frequent changes. Always replace the oil filter at every oil change — reusing a filter allows contaminated filter media to re-enter the fresh oil charge.

Pairing with GReddy MD-01 Magnetic Drain Plug:

For comprehensive engine oil protection, pair the GReddy OX-01 oil filter with the GReddy MD-01 magnetic drain plug. The OX-01 captures non-metallic contaminants and larger particles through its filter media, while the MD-01's Neodymium magnet captures fine ferrous metal wear particles that can pass through the filter media. Together, they provide a complete oil filtration upgrade that protects the engine from both particulate contamination and ferrous wear debris — a simple, cost-effective combination for any performance build.

Why GReddy?

GReddy (Trust Co., Ltd.) is one of Japan's most respected performance parts manufacturers, with decades of motorsport and street performance heritage. Their attention to quality and engineering extends across their entire product range, from turbocharger systems to oil filters. The GReddy OX-01 reflects their commitment to providing quality performance components at every level of the build.

Perfect For:

• Honda Civic, Integra, Accord, S2000, and NSX builds with 3/4-16 UNF oil filter thread
• Subaru WRX, STI, and Forester builds using 3/4-16 UNF oil filter thread
• Any 3/4-16 UNF application wanting GReddy quality oil filtration
• Performance builds wanting a quality Japanese brand oil filter replacement
• Shops stocking a versatile performance oil filter for Honda/Acura and Subaru platforms

Perfect For: Honda, Acura, Subaru, and other 3/4-16 UNF applications seeking GReddy OX-01 performance oil filter for quality filtration and reliable engine protection.

Pro Tip: Pair with the GReddy MD-01 magnetic drain plug for complete oil system protection — the filter captures particulate contamination while the magnetic plug captures fine ferrous wear particles that pass through filter media.

3/4-16 UNF: 65mm diameter. 75mm height. Anti-drain back valve. Fits Honda, Acura, Subaru, and other 3/4-16 UNF applications. 0.6 lbs. Replace at every oil change. Verify thread and dimensions before ordering.

Protect your engine with GReddy OX-01 — 3/4-16 UNF thread, 65mm x 75mm, quality performance filtration for Honda, Acura, and Subaru platforms.