ISR Performance V2 Oil Sandwich Plate + -8AN Oil Cooler Kit - Nissan 240sx

The ISR Performance V2 Oil Cooler Kit is a complete bolt-on oil cooling solution for the SR20DET-powered Nissan 240SX. The V2 kit pairs a 16-row oil cooler core with -8AN black nylon braided lines and ISR's signature gold-anodized oil block sandwich adapter. Includes both S13 (UNF 3/4-16) and S14 (M20 x 1.5) thread pitch adapters in the box, so the same kit works on either chassis. This is the -8AN version; for higher-flow builds, see the -10AN variant (IS-240SR-OCK10-GB).

What It Does

The factory SR20DET cooling system is fine for stock power and stock driving, but the moment you add boost, track laps, or sustained high-RPM use, oil temps climb fast. This kit routes engine oil through a 16-row dedicated cooler using -8AN braided lines, then back to the engine, dropping oil temperatures meaningfully under load. Cooler oil means longer bearing life, more consistent oil pressure, and a bigger margin before things get into trouble territory.

-8AN vs -10AN

-8AN is the right size for most street, light track, and grassroots drift builds. -10AN flows more oil and is recommended for serious built motors, high-horsepower builds, or extended sustained-load applications. If you're not sure which to pick, -8AN is the standard and covers the vast majority of SR20DET builds.

S13 vs S14 Thread Pitch

The S13 and S14 SR20DET use different oil filter thread pitches. This kit includes both adapter sizes:

• S13: UNF 3/4-16
• S14: M20 x 1.5

Use the correct adapter for your specific chassis. The other adapter can be saved as a spare.

Pair With the ISR Oversized Oil Pan

For the ultimate SR20DET oiling upgrade, pair this cooler kit with the ISR Performance oversized SR20DET oil pan. The oversized pan adds capacity and improves baffling against starvation, complementing what the cooler is doing on the temperature side.

Fitment

• 1989-1994 Nissan 240SX (S13) with SR20DET swap
• 1995-1998 Nissan 240SX (S14) with SR20DET (factory or swapped)

What's in the Box

• 1x 16-row oil cooler core
• 2x -8AN black nylon braided oil lines
• 1x Gold-anodized ISR Performance oil block sandwich adapter
• 1x UNF 3/4-16 thread adapter (S13)
• 1x M20 x 1.5 thread adapter (S14)
• Mounting hardware

Product Details

Brand: ISR Performance

Part Number: IS-240SR-OCK-GB

Type: Engine Oil Cooler Kit (V2, -8AN)

Vehicle Fitment: 1989-1998 Nissan 240SX (S13 / S14) with SR20DET

Engine Compatibility: Nissan SR20DET

Cooler Size: 16-row

Line Size: -8AN

Line Finish: Black nylon braided

Sandwich Adapter: Gold-anodized ISR signature

Thread Adapters Included: UNF 3/4-16 (S13) and M20 x 1.5 (S14)

Higher-Flow Alternative: IS-240SR-OCK10-GB (-10AN)

Application: Street, track, and grassroots drift SR20DET builds

Sold: Complete kit

Legality: Off-road and competition use only