Kelford camshafts, BMW B58 Gen 2 / Toyota GR Supra A90 (2018-2026)

Kelford camshafts, BMW B58 Gen 2 / Toyota GR Supra A90

Kelford is a New Zealand camshaft manufacturer with roots in Christchurch dating back to 1968. Its profiles range from upgrades for street-driven cars to fully built race engines. Choose the cam around the rest of the engine and its intended use, rather than simply picking the longest duration.

This selection is for the BMW B58 Gen 2 / Toyota GR Supra A90 engine. Profile differences, spring recommendations and required modifications are detailed below.

Technical specifications – available profiles for this engine

Profile 258-A

Stage 1 for a B58 Gen 2 with upgraded intake, exhaust and turbo. The manufacturer's suggested range is approximately 550–750 hp with a 58–68 mm turbo. Valvetronic and Dual VANOS remain functional. Upgraded springs are required, KVS58-BT is recommended. Confirm the engine revision before ordering, as Kelford distinguishes Gen 1, Gen 1.5 and Gen 2 camshaft versions.

Manufacturer profile information

Profile 258-B

Stage 2 for a built B58 Gen 2 making approximately 750–1,000 hp with a 62–72 mm turbo. Suitable for an aftermarket intake manifold. Valvetronic and Dual VANOS can remain functional. With an aftermarket throttle body, Valvetronic can be locked fully open. Requires upgraded valve springs, KVS58-BT is recommended.

Manufacturer profile information

Profile 258-C

Stage 3 for a B58 Gen 2 drag engine making over 1,200 hp with a 72 mm or larger turbo at high boost. Intended for ethanol blends or methanol. Requires a free-flowing aftermarket intake manifold and separate throttle body. Kelford recommends locking Valvetronic fully open and using KVS58-BT springs.

Manufacturer profile information

Checking heights are shown with the duration figures. Net lift is the net valve movement specified by the manufacturer, while cam lift is listed separately. IVO/IVC denote intake valve opening/closing and EVO/EVC exhaust valve opening/closing. BTDC/ATDC mean before/after top dead centre, and BBDC/ABDC before/after bottom dead centre.

Installation and profile selection

Confirm the exact engine version, valvetrain design and the modifications required by the profile. Check cam timing and valve-to-piston clearance during installation. Springs, lifters and other supporting parts mentioned with a profile are not included unless the profile explicitly states that they come with the kit.

For the B58 Gen 2 engine only. Earlier or later B58 versions in the same chassis may use different camshafts. Confirm the engine and camshaft version.

Examples of related vehicle applications

• Toyota GR Supra A90/A91 3.0 B58 (2019–2026)
• BMW M340i G20/G21, B58 Gen 2 (2019–2026)
• BMW 540i G30/G31, B58 Gen 2 (2020–2023)
• BMW 640i GT G32, B58 Gen 2 (2020–2023)
• BMW 740i G11/G12 LCI, B58 Gen 2 (2019–2022)
• BMW 840i G14/G15/G16, B58 Gen 2 (2019–2026)
• BMW X3 M40i G01 / X4 M40i G02, B58 Gen 2 (2019–2024)
• BMW X5 xDrive40i G05 / X6 xDrive40i G06, B58 Gen 2 (2018–2023)
• BMW X7 xDrive40i G07, B58 Gen 2 (2019–2022)
• BMW Z4 M40i G29, B58 Gen 2 (2019–2026)

The list covers versions with the specified engines only. Exact fitment and required modifications depend on the selected profile, cylinder head, lifters and timing system.

Kelford Cams