NAPREC Forged Big Valve

The valve head is forged and finished with a computer-controlled machine.
The material for the exhaust and intake are the same as what is used by the original manufacturer.
As the valves undergo a nitride treatment process, they have improved abrasion and scuffing resistance, as well as excellent bend resistance.

RB26DETT : JP¥59,400 (One full set of INT and EXH)

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	RB26DETT
	INT	EXH Special valve guide necessary.
Head diameter	φ36 (+1.5)	φ31.5 (+1.5)
Stem diameter	φ6	φ6 (No Sodium)
Stem length	STD	STD
Weight	49.3g (-0.5g)	42g (+-0)

SR20DET : JP¥39,600 (One full set of INT and EXH)

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	SR20DET *(To RNN14, impossible to install.)
	INT	EXH
Head diameter	φ35 (+1)	φ31 (+1)
Stem diameter	φ6	φ7 (No Sodium)
Stem length	STD	STD
Weight	47.4g (-0.9g)	46.7g (+0.3g)

SR20VE : JP¥55,000 (One full set of INT and EXH) 

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	SR20VE
	INT	EXH
Head diameter	φ35 (+1)	φ31 (+1)

4AG(4V) : JP¥32,560 (One full set of INT and EXH)

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	4AG(4V)
	INT	EXH
Head diameter	φ31.5 (+1)	φ27.0 (+1.0)
Stem diameter	φ6	φ6
Stem length	STD	STD
Weight	38.8g (-2.2g)	33.8g (-2.5g)

2JZ-GTE : JP¥59,400 (One full set of INT and EXH)

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	2JZ-GTE
	INT	EXH
Head diameter	φ34.5 (+1.0)	φ29.8 (+1.5)
Stem diameter	φ6	φ6
Stem length	STD	STD
Weight	44.5g (-5.5g)	39.5g (-4.5g)

1JZ-GTE : JP¥59,400 (One full set of INT and EXH)

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	1JZ-GTE
	INT	EXH
Head diameter	φ33 (+1.0)	φ31 (+1)
Stem diameter	φ6	φ6
Stem length	STD	STD
Weight	41.8g (-4.0g)	40.9g (-2.5g)

4G63 : JP¥44,000 (One full set of INT and EXH)

NOTE: Parenthesis under head diameter indicates added length. Unit is mm.	4G63
	INT	EXH
Head diameter	φ35 (+1)	φ31.5 (+1)
Stem diameter	φ6.6	φ6.6
Stem length	109.4(+-0)	109.5(-0.1)
Weight	52.3g (-3.2g)	47.2g (No Sodium: -7.6g) (With Sodium: +2g)