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Supertech Performance Valves Supertech Performance Valves
- High Flow Rates
- Less Friction
- More Power
- Featuring Black Nitrided Treatment!

Supertech Extreme Flow Performance Valves for Pro Street and Racing are engineered for High RPM and High HP. Extreme Flow Valves outperform any other valve on the market today, and with their Nitride Coating are perfect for High Temperatures (and run cooler which improves value life), Nitrous, Turbos and Superchargers. For naturally aspirated motors these valves will give you a much greater cylinder flow for good HP gains.
Intake and Exhaust Valves are One Piece Forged, High Temperature, High Nickel, Stainless Steel Alloy. Valves are CNC finished to strict tolerances making these valves the choice for the most demanding race classes.
Three Types of Valves:
(color coded in TYPE column for easy reference)

#1) Black Nitride (Coating):
Part # ending in "N"

The micro-hardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (micro-hardness is 800HV minimum). Surface finish is smoother than with chromed stems, having less friction between stem and guide. ---
Valve seat surface is harder with the nitrided layer, lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Matches any kind of seats (nodular iron seats, steel powder metal seats, hard aluminum-copper seats or beryllium copper seats). ---
The higher the engine speed the bigger the power loss due to internal engine friction! The black nitride layer reduces this power loss due to less valve-guide friction. The nitrided layer is adhered to the base material at a microscopic level, so does not "flake" or brake when the valves bend due to impacts with the pistons. ---
The Black Nitride applies to the whole valve while the chrome coating is only applied to the stem. All valves are swirl polished, have stem undercut and a hardened tip

#2) Chrome (special coating used only as noted):
Part # ending in "C"

Widely used and known in high performance valves Only applied to stem.

#3) Inconel (special valve material used only as noted):
Part # ending in "I"

Inconel 751/Nimonic - These Nickel based alloy materials are used for Exhaust valves in engines that reach very high temperatures and its use is growing with the application of turbos and superchargers.
Item INT
Description Price
Per Valve
MEVI-1007 EXH I 4G63 Valve 30.50x6.54x109.6mm / Std $23
MEVI-1009 EXH I 4G63 Valve 31.50x6.54x109.6mm / 1mm + $23
MEVI-1010 EXH I 4G63 Valve 32.50x6.54x109.6mm / +2mm $25
MEVI-1011 EXH I 3000/6G72 Racing Valve 31(+0.5) x6.54x105.5mm $26
MEVI-1012 EXH I 3000/6G72 Racing Valve 31.50x6.54x105.5mm /1mm ++ $25
MEVI-1013 EXH I 3000/6G72 Racing Valve 32.50(+2mm)x6.54x105.5mm $27
MEVN-1007 EXH N 4G63 Valve 30.50x6.54x109.60mm / SS $15
MEVN-1008 EXH N 4G63 Racing Valve 31x6.54x109.6mm / SS/ 0.5mm oversize. $15
MEVN-1009 EXH N 4G63 Valve 31.50x6.54x109.6mm / SS/  1mm + $15
MEVN-1011 EXH N 3000/6G72 Racing Valve 31x6.54x105.5mm / SS/  0.5mm oversize. $15
MEVN-1013 EXH N 3000/6G72 Racing Valve 32.50x6.54x105.5mm / SS/  2mm ++ $15
MEVN-1420 EXH N 420A Valve 30.70(std)x5.95x110 mm / SS.. $21
MEVN-1422 EXH N 420A Valve 31.70(+1mm)x5.95x110 mm / SS $21
MEVI-1017 EXH N EVO X/ 4B11 29.0mm (std) head dia, 5.46 stem dia, 105.9mm length $28
MIVN-1017 INT N EVO X/ 4B11 35.0mm (std) head dia, 5.47 stem dia,
113.25mm length,
MEVI-1019 EXH I EVO X/ 4B11 30 (+1) x 5.46 x 105.9 mm / Tip 3.10/ INCONEL. $28
MIVN-1019 INT N EVO X/ 4B11 36.00(+1) x 5.47 x 113.25 mm / SS/ Blk. Nitrided / Undercut/ 30º Back-cut/ Swirl Polish $16
MIVN-1007 INT N 4G63 Valve 34.00x6.74x109.60mm / SS $15
MIVN-1008 INT N 4G63 Racing Valve 34.50x6.57x109.60mm / SS/  0.5 mm oversize. $15
MIVN-1009 INT N 4G63 Valve 35.00x6.57x109.6mm / SS/  1mm + $15
MIVN-1010 INT N 4G63 Valve 36.00x6.57x109.6mm / SS/  2mm + $15
MIVN-1011 INT N 3000/6G72 Racing Valve 35.5x6.57x106.50mm / SS/0.5 mm oversize. $16
MIVN-1012 INT N 3000/6G72 Racing Valve 36x6.57x106.50mm / SS / 1 mm ++ $16
MIVN-1420 INT N 420A Valve 35(std)x5.96x111.70 mm / SS $21
MIVN-1422 INT N 420A Valve 36(+1mm)x5.96x111.70 mm / SS/  Undercut/ back-cut $21

Order/Tech Line: (603) 378-0090
Email: info@importperformanceparts.net

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*All prices on this site are subject to change without notice. Import Performance Parts™ disclaims responsibility for any printing or typographical errors, and does not guarantee that all information is accurate.

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