Welcome To MotorDyne Engineering - FX35

The FX35 will accept any size spacer but for maximum performance, the MD XL ½" spacer should be used.

BASIC PLENUM SPACER

5/16" Basic Plenum spacer

This stealth modification adds 10HP-13HP and is the simplest to install. The 5/16" plenum spacer is fully compatible with all stock and aftermarket strut bars. The engine cover easily fits and never needs to be cut. With the engine cover and strut bar in place the engine bay looks completely stock.

~~$ 230.00~~ $ 199.00

1/2" Basic Plenum spacer

This stealth modification adds 11HP-14HP and is the simplest to install. This plenum spacer can be used for maximum performance enhancement. It also adds a substantially deeper growl under the hood. The 1/2" plenum spacer is fully compatible with the engine cover but is too large to fit the stock strut bar.

With the engine cover in place the engine bay looks completely stock with the only difference being the strut bar is not installed.

$ 265.00

ISO THERMAL PLENUM SPACER

5/16" Iso Thermal plenum spacer

This stealth modification adds 11HP-15HP and reduces the effect of power robbing heat soak. The 5/16" plenum spacer is fully compatible with all stock and aftermarket strut bars.

The engine cover easily fits and never needs to be cut. With the engine cover and strut bar in place the engine bay looks completely stock.

~~$ 260.00~~ $ 239.00

1/2" Iso Thermal plenum spacer

This stealth modification adds 12HP-16HP and reduces the effect of power robbing heat soak. This plenum spacer can be used for maximum performance enhancement. It also adds a substantially deeper induction growl under the hood.

The 1/2" plenum spacer is fully compatible with the engine cover but is too large to fit the stock strut bar. With the engine cover in place the engine bay looks completely stock with the only difference being the strut bar is not installed.

$ 295.00

COPPER ISO THERMAL PLENUM SPACER

5/16" Copper Iso Thermal plenum spacer (with all Iso Thermal components, Aramid gasket and the Polarized Copper TB heater)

This premium stealth modification adds 11HP-15HP and reduces the effect of power robbing heat soak. The 5/16" plenum spacer is fully compatible with all stock and aftermarket strut bars. The engine cover easily fits and never needs to be cut. With the engine cover and strut bar in place the engine bay looks completely stock. Use the copper if it ever snows in your area.

~~$ 295.00~~ $ 274.99

1/2" Copper Iso Thermal plenum spacer (with all Iso Thermal components, Aramid Gasket and the Polarized Copper TB heater)

This premium stealth modification adds 12HP-16HP and reduces the effect of power robbing heat soak. This plenum spacer can be used for maximum performance enhancement. It also adds a substantially deeper growl under the hood. The 1/2" plenum spacer is fully compatible with the engine cover but is too large to fit the stock strut bar. With the engine cover in place the engine bay looks completely stock with the only difference being the strut bar is not installed. Use the copper if it ever snows in your area.

$ 345.00

MREV 2 Manifold™

Iso Thermal MREV 2 Manifold™- Standard lower collector with modified Intake Runners for reduced pressure drop

The Motordyne MREV 2 Manifold Iso Thermal! A universal stealth mod for use on any 350Z, G35, M35 and FX 35. When used with or without a spacer or aftermarket plenum, this modified lower collector will make substantial power gains.

Multiple independent test show when used with a 5/16" spacer on the REVUP engine, the combination will add a "minimum" of 15+ HP and 18+ TQ in the upper midrange. Many independent MREV 2 Manifold REVUP tests have dynod in excess of 20HP and 30 TQ in the upper midrange and with high RPM peak power increased by 3-5 HP.

On the road course or drag strip this lower collector adds substantial HP and TQ. No other normally aspirated VQ modification provides as much gains as MREV 2 Manifold!

Note: A $100 core exchange rebate is available for those of you with non-REVUP lower collectors. Contact us for more information.

$ 439.00

ACCESSORIES

Iso Thermal upgrade with Aramid gasket and Coolant Control Valve

This premium stealth modification adds 1HP-2HP and reduces the effect of power robbing heat soak. Motordyne Iso Thermal is the most comprehensive plenum thermal management system available. The upgrade will reduce heat transfer into the upper and lower plenum assembly. This helps to reduce power loss as the engine becomes heat soaked. Compatible with any type of plenum stock or modified. Recommended for warm climates generally above 45 ° F.

When ordering Iso Thermal for an existing Motordyne spacer, please specify your spacer size in the comment window of the check out page.

Note: You do not need this upgrade if you are also purchasing a Iso Thermal or Copper Iso Thermal plenum spacer.

$ 40.00

Copper Iso Thermal upgrade with Aramid gasket and Copper Throttle Body Heater

This premium stealth modification adds 1HP-2HP and reduces the effect of power robbing heat soak. Compatible with any type of plenum stock or modified and compatible with any type of weather hot or cold. Copper Iso Thermal also reduces heat transfer into the upper and lower plenum assembly, but the Copper Throttle Body Heater keeps the throttle body heated to prevent ice formation on the throttle body valve on very cold or snowy days. If it snows in your area use the Copper Iso Thermal to keep the TB heated and still take full advantage of the cold dense air for increased HP.

Note: You do not need this upgrade if you are also purchasing a Iso Thermal or Copper Iso Thermal plenum spacer.

$ 70.00

Aramid Gasket

Aramid thermal isolating gasket that is installed between the lower plenum and intake manifold. By installing the Iso Thermal™ Aramid gasket between the intake manifold and lower plenum the heat transfer is significantly reduced and both the upper and lower plenum assembly run at much lower temperatures.Note: You do not need this upgrade if you are also purchasing a Iso Thermal or Copper Iso Thermal plenum spacer.

$ 32.00

Stock Manifold Gasket

The steel stock manifold gasket installed between the lower plenum and intake manifold. Use two of these gaskets, or the Aramid Iso Thermal gaskets, with a Manifold spacer to achieve the proper height needed for injector clearance. ~0.020” Thickness

$ 22.00

Manifold Spacer, 1/2"

The Manifold spacer is installed between the lower plenum and intake manifold. Installing the Manifold spacer between the intake manifold and lower plenum allows additional clearance for oversize injectors commonly used in Forced Induction applications.

$ 80.00

Manifold Spacer, 1/4"

$ 80.00

Bolt Kit, 1/2"

Bolt Kit for the Motordyne FX35 Plenum Spacers

$ 45.00

Bolt Kit, 5/16"

Bolt Kit for the Motordyne FX35 Plenum Spacers

$ 45.00

General Information:

Plenum Spacers:

Instantly add 10-15 horsepower and a deeper engine note to your Z or G with a Motordyne plenum spacer. The Motordyne Plenum spacers are stealth. The 5/16" spacer is designed to work with your car's stock engine cover and strut bar. Installation is fast and easy; other than unbolting the stock collectors to switch in parts, nothing else is modified or changed. There are two sizes of plenum spacers to choose from and each offers an advantage for different applications. Both add power and a deeper growl under the hood. The 1/2" spacer typically yields 1 to 1.5 HP more than the 5/16" plenum spacer.

For turbo charged and super charged vehicles, the gains can easily exceed 17-23 HP.

Iso Thermal and Copper Iso Thermal:

Iso Thermal and Copper Iso Thermal upgrades reduce heat transfer to substantially reduce upper and lower plenum temperatures. Cooler intake air temperatures increase air density and reduces the tendency for detonation or ping.

1) The first component is an Aramid thermal isolating gasket that is installed between the lower plenum and intake manifold. By installing a Motordyne Iso thermal Aramid gasket between the intake manifold and lower plenum, the heat soak is significantly reduced.

2) The second component is the throttle body Coolant Control Valve (CCV). The CCV allows you to selectively heat (or not heat) the plenum assembly. With local weather temperatures below 55'F the valve is left open. In warmer weather the valve can be closed for maximum thermal benefits.

3) The third thermal management component is the Iso Thermal plenum internal supports. The plenum internal supports are self retaining and self sealing. In addition to providing sealing and support, the internal supports are thermally non-conductive to effectively shut down heat transfer through the six plenum internal posts.

4) The fourth thermal management component is the Copper Throttle Body heater. Copper Iso Thermal is a premium set and forget component that can be used in place of the Coolant Control Valve (CCV). It doesn't matter how hot or cold the weather is, you don't have to adjust a valve based on the season or ambient temperatures. Install it and the throttle body remains heated while the plenum continues to remain thermally isolated. Keeping the throttle body heated prevents ice formation on the throttle body butterfly valve when driving in cold weather. If it snows or gets really cold in your area, use the Copper Iso Thermal so your engine can take full advantage of the cold air you are driving in.

MREV 2 Manifold:

The Motordyne MREV 2 Manifold is high-torque plenum mod designed for use on any VQ engine.

When used with a 5/16" spacer on the REVUP engine, every test to date shows MREV 2 Manifold will add a "minimum" of 15+ HP and 18+ TQ at 4500 RPM. MREV 2 Manifold is easily the single most effective bolt on modification available for the REVUP VQ engine.

When used with on the non-REVUP engine, the gains are very similar to that of the 5/16" spacer but the MREV 2 Manifold will show a slightly lower peak value, with a slightly higher average value and a slightly higher TQ value. Overall, MREV 2 Manifold provides "area under the curve" and is the highest gain plenum mod available.

Stealthy and Discrete:

All Motordyne plenum modifications are stealthy. When installed, most people looking at them wouldn't even know a high performance modification was there. The CNC cut spacers conform very tightly to the stock plenums complex shape for a professionally engineered look. And they have a grit blast finish that allows them blend in with the OEM sand cast plenum. The spacers are cut from alloy aluminum and can resist any amount of thermal soak or boost.

All Motordyne products are for off road use only.

If you have any questions we can be reached at: Info@MotordyneEngineering.com

Motordyne Engineering

Motordyne Products are Patent Pending