Supertech for BMW Z3 (1996-2002)

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Supertech Black Nitrided Intake Valve - +1mm Oversize - Set Of 12 - BMW M50/M52/S50/S52
Supertech Black Nitrided Intake Valve - +1mm Oversize - Set Of 12 - B...
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T#:8549425
Part#: BMIVN-1031S-12
In Stock
$ 384.99

This product was last offered at the strikethrough price on
06-03-2026

$ 347.99 USD
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$ 384.99

This product was last offered at the strikethrough price on
06-03-2026

$ 347.99 USD
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Add to Wish List
Upgraded valves designed for high horsepower applications! Our valves are not finished from generic blanks rather they are specifically designed for each and every application. We work relentlessly, testing and researching every aspect trying to improve the air flow of our designs. With every valve design, we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc. It’s unlikely you will find any of our competitor’s valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you won’t find a better sealing, better performing and easier to install solution anywhere! Optimum high flow rates are achieved by ensuring that our valves are manufactured with the best angles for each application. We consider back cut, under cut and valve head angles for each application to produce the optimum high flow rates for each application. In 2006 we introduced our stem Superfinishing as a standard addition to all of our valves at no additional cost. When our Superfinish is combined with our Black Nitrided valve, it reduces the surface roughness to 1/3 of our chrome coated valve. The end result… unsurpassed performance and durability. Our intake valves are made exclusively from an enhanced versions of EV8 (21-4N) steel. Black Nitride Coating: This is a hardening treatment that has been steadily growing in popularity over the last several years. These black Nitride coated valves feature harder surfaces and smoother finishes, providing less friction and subsequently longer life. Please see below for more benefits of our Black Nitride valves. Black Nitride Coating Head Diam: 33mm Material: Stainless Steel 21-4N Groove Type: Triple Groove Length: 123.7mm Stem Diam: 6.95mm
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Supertech BMW S54 Dual VALVE Spring Kit - E46 M3 Z3M Z4M
Supertech BMW S54 Dual VALVE Spring Kit - E46 M3 Z3M Z4M
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Supertech - Corporate Logo
T#:7403169
Part#: SPRK-2521-2BM-T1
In Stock
$ 1,050.99

This product was last offered at the strikethrough price on
05-03-2026

$ 919.99 USD
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$ 1,050.99

This product was last offered at the strikethrough price on
05-03-2026

$ 919.99 USD
Limited Qty Sale
Free Shipping
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Dual valve spring kit to be used with triple groove valves and OEM locks.
Supertech High Performance Valve Spring Set - E46 M3, MZ3 (S54), MZ4
Supertech High Performance Valve Spring Set - E46 M3, MZ3 (S54), MZ4 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Supertech - Corporate Logo
T#:11760
Part#: TMS11760
Ships in 8 Business Days
$ 1,038.99 USD
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$ 1,038.99 USD
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For BMW's with S54 engines, these valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for high performance and durability at high rpms, with better memory. These are extremely high quality, offered at the best price.

Computer designed to ensure that the wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme racing conditions. Computer software allows Supertech to make sure that the harmonics are well under control.

The retainers are manufactured with high quality military certified Titanium alloy, CNC machined for a tight fit that will ensure a long durability.

This item fits the following BMWs:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe
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