The CSF 7231 is a high-performance all-aluminum radiator for the 1999-2002 Nissan Skyline R34 GT-R (BNR34), including Nismo, V-Spec, and M-spec. It uses a 2-row 42mm ultra-high-performance dual core with 75 cooling tubes on CSF's B-Tube Technology for about 15 percent more tube surface area, and 6.5mm multi-louvered fins across 76 fin rows. It is 100 percent aluminum TIG-welded with aluminum tanks in place of the OEM plastic units, and ships with a 1.4-bar high-pressure CSF cap. It is based on the early GT-R slim-tank design and fits both early and late R34 GT-R models, with a shroud adapter note for late variants. The R34 25GT non-turbo uses the 7230 radiator instead.
- Core: 2-row 42mm ultra-high-performance dual core
- Tubes: 75 cooling tubes with CSF B-Tube Technology
- Fins: 6.5mm tall multi-louvered (76 fin rows)
- Construction: 100 percent aluminum TIG-welded, aluminum tanks (OEM plastic)
- Cap: 1.4-bar high-pressure radiator cap with CSF logo
- Fitment: factory-location drop-in, no modifications
- Engine: RB26DETT
- Note: R34 25GT non-turbo uses 7230
- Part number: 7231
Vehicle Applications
Direct fit on the following:
- 1999 Nissan Skyline GT-R (R34, RB26DETT)
- 2000 Nissan Skyline GT-R (R34, RB26DETT)
- 2001 Nissan Skyline GT-R (R34, RB26DETT)
- 2002 Nissan Skyline GT-R (R34, RB26DETT)
FAQ
What vehicles does the CSF 7231 fit?
The 1999-2002 Nissan Skyline R34 GT-R (BNR34), including Nismo, V-Spec, and M-spec.
Does it fit the non-turbo R34?
No. The R34 25GT non-turbo uses the 7230 radiator instead.
How is the core built?
A 2-row 42mm dual core with 75 B-Tube cooling tubes and 6.5mm multi-louvered fins.
Is it all-aluminum?
Yes. It is 100 percent aluminum TIG-welded with aluminum tanks and a 1.4-bar high-pressure cap.
