TOMEI OVER SIZE VALVE

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

FEATURE / SPEC

■ HIGH FLOW DESIGN・1mm OVERSIZED WAIST SHAPE




■ SURFACE TREATMENT (INTAKE SIDE ONLY)

■ HIGH HEAT RESISTANCE

■ PRECISION DESIGN

SPEC

APPLICATION	IN/EX	VALVE DIAMETER (mm)	STEM DIAMETER (mm)	LENGTH (mm)	MATERIAL
VR38DETT R35 GT-R	IN	38.15	5.970	95.00	SUH35SUH35
	EX	33.15	5.955	92.00	751INCONEL 751
RB26DETT BNR32/BCNR33/BNR34	IN	35.65	5.970	102.30	SUH35SUH35
	EX	31.15	6.940	101.20	751INCONEL 751
SR20DET (R)PS13/S14/S15	IN	35.15	5.970	101.40	SUH35SUH35
	EX	31.15	6.940	102.10	INCONEL 751
4B11 CZ4A	IN	35.95	5.470	113.25	SUH35SUH35
	EX	29.95	5.460	105.85	751INCONEL 751
4G63 EVO.1-9/ECLIPSE	IN	35.00	6.570	109.60	SUH35SUH35
	EX	31.50	6.540	109.60	751INCONEL 751
EJ207/255/257	IN	37.00	5.962	104.35	SUH35SUH35
	EX	33.00	5.955	104.70	751INCONEL 751

For more details please go through the below link...
TOMEI OVER SIZE VALVE