Building the Nissan VQ37VHR!

The down pipes use thick CNC machined flanges and have laser cut mounting tabs for an easy bolt on and great fit.  We really like the modular nature and compatibility with any mix of the stock parts than the Z1 Motorsports parts offer.

The next part of the 400 hp package is Z1’s ported stock intake manifold. Z1 takes a stock Nissan intake manifold, takes it apart, ports and contours it internally and glues it back together.

You can see some of the porting looking into the lower runners.  There is a lot more inside such as radiusing around the running inlets in the plenum, but we can’t show it because the manifold is glued back together.

You can see more of the porting where the throttle bodies bolt on.

To finish off the intake tract, we used Z1’s race air intake system.  We opted for the wrinkle black finish although the intake is available in polished or wrinkle red. The tubes are made out of smooth mandrel bent 6061 aluminum with integral bosses for the mass air sensors.

The rest of the intake uses smooth silicone hoses to snake past the core support to the front of the car.


  1. Interesting – I’d always wondered what the limits would be on those. I feel like the valve actuation system is really cool for at least OEM power goals.

    1. The biggest issue is oil temperature on track. They make great street motors; but a VQ35HR head is going to be the better option for extended high RPM use.

  2. What’s the pros and cons of keeping the MAF sensors compared to using a MAP sensor in this application? (I’m assuming an aftermarket ecu will be used)

      1. ECUTEK is pretty versatile for what it is. I think it is the best option for OEM our of the few pieces of software out there.

  3. Can you direct me where to buy this particular spec of JE pistons and rings set please? I couldn’t find it anywhere on JWT or JE website. Cheers

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