ISR Performance S13 SR20DET Turbo Lines - Top Mount

The ISR Performance S13 SR20DET Turbo Lines are a direct replacement steel braided oil and water line set for the factory turbo hardlines on the S13 SR20DET top-mount turbo (T25). Built from current-generation racing hose with a pre-dyed black Nomex outer cover and Kevlar reinforcement, terminated with aircraft-grade fittings. New aluminum crush washers included.

What It Does

The factory SR20DET oil and water lines to the turbo are steel hardlines, which work fine when new but crack, leak, and corrode over time. Replacing them with braided AN-style lines fixes those failure modes, looks dramatically cleaner in the engine bay, and gives you serviceable AN fittings instead of single-use hardline crimps.

This kit covers both oil feed and water lines and is a direct OEM replacement, so no chassis modifications or alternate routing is required.

Hose Construction

These lines use ISR's current-generation racing hose:

• Black nylon reinforced synthetic rubber inner tube
• Pre-dyed black Nomex outer cover for fade-resistant appearance
• Kevlar reinforcement in the Nomex cover for abrasion resistance and tensile strength
• Up to 45 percent lighter than conventional high performance racing hose assemblies
• Fire-retardant outer cover

Critical Fitment

S13 SR20DET top-mount turbo only. The S13 SR20DET uses a T25 turbo with top-mount turbo positioning. This line set is sized and routed for that specific configuration.

Not for:

• S14 SR20DET (T28 turbo, different fitment - separate line set)
• Bottom-mount or relocated turbo setups
• Aftermarket top-mount manifold setups with different fitting locations

Fitment

• 1989-1994 Nissan 240SX (S13) with SR20DET swap, top-mount T25 turbo
• Direct OEM replacement for S13 SR20DET T25 hardlines

What's in the Box

• Complete S13 SR20DET turbo line set (oil and water)
• Aircraft-grade AN fittings
• New aluminum crush washers

Product Details

Brand: ISR Performance

Part Number: IS-T25-NS13-EXT

Type: Steel Braided Turbo Oil and Water Line Set

Vehicle Fitment: 1989-1994 Nissan 240SX (S13) with SR20DET, top-mount T25 turbo

Turbo Configuration: Top-mount T25 only

Replaces: Factory SR20DET steel hardlines

Hose Construction: Black Nomex cover, Kevlar reinforced, synthetic rubber inner

Fittings: Aircraft-grade AN

Crush Washers: New aluminum washers included

Weight Advantage: Up to 45 percent lighter than conventional racing hose assemblies

Application: Direct OEM replacement, no chassis modification required

Sold: Complete oil and water line set

Legality: Off-road and competition use only