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More suited to mid-high rpm power
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These are a direct fit for the R35 GTR VR38DETT engine and similar to OEM Nissan part number 22448-JF00B or Hitachi part number HEX EXA 2410N
2-257-A | B58 Gen 1.5 frs More suited to mid-high rpmDesigned to suit B58 gen 1. 5 engine with bolt on intake, exhaust and turbo upgrades. For an engine producing around 550 750hp running a 58 68mm turbo. Still maintains full use of Valvetronic and Dual VANOS for good throttle response and wide power band. Must have valve spring upgrade, Kelford Cams recommend valve spring KVS58 BT. BMW have released these engines in several revisions. To simplify things the Kelford team have named these revisions Gen
