JUN has expanded it’s range of VR38DETT engine upgrades with the release of the JUN Short Head in two different flavors; the BASIC and the EX Short Head.

Included in the BASIC version is the following gear:

• New cylinder head (OEM)
• New Intake and Exhaust valves (OEM)
• New Valve Springs (OEM)
• New Valve Retainers (OEM)
• Fitting of valve train, camshafts/JUN camshafts and lifter clearance adjustment

The EX version is similar but adds these unique parts along with some porting and polishing:

• JUN Strengthened Valve Springs
• JUN Titanium Valve Retainers
• Intake and exhaust port polishing
• Valve seats cut
• Head surface verification and correction

Pricing is set at around the 718,200 yen mark for the BASIC head and 928,200 yen for the EX version in Japan.

Also along with the short head announcement comes the pricing and specs on the JUN EX 4.0L Short Block that we first saw at Tokyo AutoSalon in January this year.

The JUN EX 4.0L short block comes with the following:

• Bore x Stroke: 96.0 x 92.0 mm
• Displacement: 3996cc
• New cylinder block (OEM)
• JUN Custom Kit EX 4.0L
• JUN Piston Kit Series C
• JUN I-Beam Conrods
• JUN Crankshaft
• JUN Cylinder Liners
• New bearings
• Comes fully assembled and checked

The JUN Short Block is priced at 2,310,000 yen in Japan. Hitup their website in the links below for more information or speak to your local JUN distributor if you’re interested in local pricing.

Link: JUN Auto Short Head Website (Japanese)
Link: JUN Short Block Website (Japanese)