ISR Performance Hotpipe and HKS BOV Kit - Nissan S13 SR20DET

The ISR Performance Hotpipe and HKS BOV Kit is a complete charge-pipe and blow-off valve solution for SR20DET-swapped 1989-1994 Nissan 240SX (S13) builds running the factory S13-style intercooler. Pairs the ISR Performance polished aluminum hotpipe with a pre-welded BOV flange and the HKS Super Sequential 4 (SSQV4) blow-off valve for a clean, install-ready package.

What It Does

The "hotpipe" is the charge pipe running from the turbo's compressor outlet to the intercooler inlet. On an S13 SR20DET swap, that pipe needs to clear the engine bay, mate up to the S13 intercooler, and have a flange for a blow-off valve. This kit handles all three. The ISR hotpipe is fully polished 2.25 inch aluminum with the BOV flange already welded in place, and it ships with the HKS SSQV4 BOV ready to bolt on.

The HKS SSQV4 has the recirculating-style design typical of the HKS BOV line, which gives the well-known HKS "pshhh" sound and is a popular choice for SR20DET swaps in particular.

Fitment

• 1989-1994 Nissan 240SX (S13) with SR20DET swap
• Requires the factory S13-style intercooler (not designed for upgraded front-mount intercoolers or alternate intercooler routing)

Alternative BOV Configurations

ISR offers the same hotpipe with different BOV pairings:

• ER-S13BOVkit-H (this product): Hotpipe + HKS SSQV4 BOV
• ER-S13BOVkit-G: Hotpipe + GReddy Type FV2 BOV
• IS-22501-G: Hotpipe + GReddy adapter flange ONLY (no BOV, BYO setup)

What's in the Box

• 1x ISR Performance polished aluminum hotpipe with pre-welded BOV flange (2.25 inch)
• 1x HKS Super Sequential 4 (SSQV4) blow-off valve

Product Details

Brand: ISR Performance (hotpipe) + HKS (BOV)

Part Number: ER-S13BOVkit-H

Type: Hotpipe + Blow-Off Valve Kit

Vehicle Fitment: 1989-1994 Nissan 240SX (S13) with SR20DET swap

Engine: Nissan SR20DET

Intercooler Compatibility: Factory S13-style intercooler

Pipe Diameter: 2.25 inch

Pipe Material: Fully polished aluminum

BOV Included: HKS Super Sequential 4 (SSQV4)

BOV Flange: Pre-welded to hotpipe

Alternative Kit Variant: ER-S13BOVkit-G (GReddy BOV instead of HKS)

Sold: Complete kit

Legality: Off-road and competition use only