American Made Since 1985

I-M Shield

Lower Temps. Higher Density. More Power.

Gain cheap horsepower by lowering intake air temperatures—simple, affordable upgrades like intake manifold shields boost power without major mods.

  • One of the best ways to gain horsepower per dollar
  • Trusted by professional engine builders for proven performance
  • <li>Compatible with OEM and aftermarket intake manifolds

  • Reduces intake air temperatures for a denser air/fuel mix
  • Proudly made in the USA with high-quality materials
Continuous
1100°F
593 °C
Continuous
Intermittent
2000°F
1093 °C
Intermittent

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I-M Shield

Product Types
SKU
Description
#
140004
Universal Size - 0.125 th x 15 in x 28 in
140007
2011-14 5.0 Mustang GT
140008
Ford Racing Boss 302 5.0 Mod motors
140010
Ford Racing Cobra Jet M-9424-M50CJ
140011
Ford Racing GT350 M-9424-M52
140014
5.0 Coyote 2018 up
140015
7.3L Ford Godzilla - Coming Soon!
140020
97-2007 LS1 LS2 LS6
140021
LS3 Car intake
140022
2006-15 LS7 Factory Intake
140023
LSX-R FAST intakes
140025
I-M Shield LT4
140031
Holley LS Hi-Ram - All
140041
JK 2013-18 3.6L Pentastar
140045
09-2020 5.7L Hemi (Car)
140046
Hellcat/Demon
Product Types
SKU
Description
140004
Universal Size - 0.125 th x 15 in x 28 in
140007
2011-14 5.0 Mustang GT
140008
Ford Racing Boss 302 5.0 Mod motors
140010
Ford Racing Cobra Jet M-9424-M50CJ
140011
Ford Racing GT350 M-9424-M52
140014
5.0 Coyote 2018 up
140015
7.3L Ford Godzilla - Coming Soon!
140020
97-2007 LS1 LS2 LS6
140021
LS3 Car intake
140022
2006-15 LS7 Factory Intake
140023
LSX-R FAST intakes
140025
I-M Shield LT4
140031
Holley LS Hi-Ram - All
140041
JK 2013-18 3.6L Pentastar
140045
09-2020 5.7L Hemi (Car)
140046
Hellcat/Demon

The I-M Shield intake manifold heat shield is an affordable way to boost horsepower by reducing air intake temperatures. Designed to block heat transfer from the engine to the intake manifold, it creates a denser air/fuel mixture for increased power on naturally aspirated, turbocharged, and supercharged engines. Ideal for V-series and boxer engines, it supports the manifold air density theory—cooler intake temps mean more performance. Easy to install with high-temp adhesive, the I-M Shield fits clean, semi-smooth surfaces and is available in pre-cut or universal kits. Whether you’re a professional engine builder or DIY mechanic, it’s one of the best dollar-per-horsepower upgrades for gas or diesel engines.

FAQ

Do I need to remove my factory foam on my intake manifold, and how do I do so?

Yes, you do need to remove any factory foam underneath the intake manifold. The I-M Shield must stick to a hard surface to maintain a long-lasting bond. Peel the foam off, clean it good with carburetor spray or other degreaser, wipe with pre-paint cleaners and stick.


 

How does it create more power if the because the MAF and IAT sensors are before the IM Shield?

Any reduction in intake temperatures creates more power, regardless of sensor location. additionally, the O2 sensor downstream helps the ECU adjust for the cooler denser charge headed into the combustion cycle.


 

Why do you recommend we wipe the top of the I-M Shield before using the sealing tape on the top of it?

The foil on the Sticky Shield has a coating for manufacturing purposes and during installation grease and dirt can also affect the Weld tapes bonding capability. Wiping with a pre-paint cleaner ensures it is sticking to a clean surface.


 

How do I make horsepower and how does this work?

There are so many ways to make horsepower, the answer is literally unlimited. The one theory a

ll experts can agree on is lowering your intake air temperatures. People run their fuel through fuel coolers, heck in the old days they used to put ice on the intake manifolds. High performance superchargers and turbo’s all come with inter-coolers. Think of the intake manifold heat shield as that, and inter-cooler for your intake. The I-M Shield is the next technological step in lower intake temperatures and answers that age old question, how do I make cheap horsepower.

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