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TOMEI

Tomei OVER SIZE VALVE SET 4B11 EVO10

Tomei OVER SIZE VALVE SET 4B11 EVO10

SKU: 163405
Regular price £435.33
Regular price Sale price £435.33
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High Flow, Improved Durability, for Extreme & High Power Applications!

Tuned engines require as much fuel mixture to enter the combustion chamber as possible. So a larger diameter design was selected to optimize flow rates. Due to the extremely high temperature conditions experienced in the combustion chamber during high power runs the durability of the valves were also addressed to improve resistance to high heat conditions.
The TOMEI oversized valves were designed with the above factors and more so with the careful selection of materials to suit these conditions to the precision in the design and manufacturing processes to maximize the intake and exhaust flow rates will make your engine capable of big power when needed most.

PRODUCT INFO

APPLICATION IN/EX P/N NOTES
VR38DETT
R35 GT-R
SET 163404 ・SHEET CUT IS REQUIRED.
IN 161408
EX 161409
RB26DETT
BNR32/BCNR33/BNR34
SET 163400 ・SHEET CUT IS REQUIRED.
IN 161400
EX 161401
SR20DET
(R)PS13/S14/S15
SET 163401 ・SHEET CUT IS REQUIRED.
IN 161402
EX 161403
4B11
CZ4A
SET 163405 ・SHEET CUT IS REQUIRED.
IN 161410
EX 161411
4G63
EVO.1-9/ECLIPSE
SET 163402 ・SHEET CUT IS REQUIRED.
IN 161404
EX 161405
EJ207/255/257 SET 163403 ・SHEET CUT IS REQUIRED.
IN 161406
EX 161407

FEATURE / SPEC

■ HIGH FLOW DESIGN・1mm OVERSIZED WAIST SHAPE
1mm oversized valves were designed for increased flow efficiency on both the intake and exhaust side. The stem has a thinner design for maximizing air flow rate within the port with the reduced air flow resistance. This design with the materials used also allowed for a lighter product as well. 


■ SURFACE TREATMENT (INTAKE SIDE ONLY)
・Improved Wear Rate
・Improved Fatigue Rate
・ Improved heat resistance
・Improved corrosion resistance


■ HIGH HEAT RESISTANCE
【IN:SUH35 MATERIAL】
The SUH35 material which is known for it’s high heat resistance properties are usually used for the exhaust side. We chose to use it for the Intake side to suit the the demands of todays users for big power applications and for increased life.

【EX: INCONEL 751 MATERIAL】
Since the exhaust side can experience extreme exhaust gas temperatures of 1,000 degrees C (1,832 degrees F) during high power use the Inconel 751 material was no doubt the best option to choose to suit serious needs when every detail counts.


■ PRECISION DESIGN
To maximize the potential of the valves purpose each factor was addressed during the design process from the surface of the valve head (umbrella section) & the Valve Seat, from Stem to Cotter are all optimized with precision for optimum operating & sealing capabilities when needed most during extreme conditions. 

SPEC
APPLICATION IN/EX VALVE DIAMETER (mm) STEM DIAMETER (mm) LENGTH (mm) MATERIAL
VR38DETT
R35 GT-R
IN 38.15 5.970 95.00 SUH35
EX 33.15 5.955 92.00 INCONEL 751
RB26DETT
BNR32/BCNR33/BNR34
IN 35.65 5.970 102.30 SUH35
EX 31.15 6.940 101.20 INCONEL 751
SR20DET
(R)PS13/S14/S15
IN 35.15 5.970 101.40 SUH35
EX 31.15 6.940 102.10 INCONEL 751
4B11
CZ4A
IN 35.95 5.470 113.25 SUH35
EX 29.95 5.460 105.85 INCONEL 751
4G63
EVO.1-9/ECLIPSE
IN 35.00 6.570 109.60 SUH35
EX 31.50 6.540 109.60 INCONEL 751
EJ207/255/257 IN 37.00 5.962 104.35 SUH35
EX 33.00 5.955 104.70 INCONEL 751
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