If installing this under the hoodliner stops the heat from reaching the hood does this make the engine run hotter?

It will keep the hood from absorbing heat.In theory the hood is acting like a like a heat sink letting air flowing over it to help dissapate the hot temperature.But all it really does is deflect the heat down and around the engine.I used it on my hot running sports car and got no noticeable difference in engine temp.It did do a terrific job of keeping the hood from frying the paint.

For firewall application to reduce noise/heat would you recommend using Hoodliner on top of Dynamat Extreme or just this?

I recommend both Dynamat Extreme & this. That's what I did. It has held up now for nearly a year. That said, there was only about a 10-20% reduction of noise from my diesel. Most of that being higher frequencies. That's just the way of diesels though.

Does this work for high frequency eng/trans noise if applied to the floor boards or firewall and hood?

Not sure about high frequency, but it does muffle the engine noise. I have a cab forward vehicle (Jeep FC170) where the engine sits between the seats.

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Hoodliner – Noise & Heat Insulation Kit for Your Car Hood – Keeps Engine Noise In & Protects Paint from Engine Heat – Easy Self Adhesive Install – 1 Sheet 32"x 54", 12 sq ft

Product ID: 280803994

Details

Brand
Dynamat
Item thickness
1 Millimeters
Material
Polyethylene
Product dimensions
137.2L x 81.3W
Recommended uses for product
car

🔇97% noise absorption

🔥Reflects 97% radiant heat

🛠️Easy self-adhesive install

$311.17

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Description

🔇 Drive Quiet, Stay Cool – The Ultimate Hood Upgrade!

TRUSTED BY PROS - Chosen by top custom builders for unmatched performance and durability.
EFFORTLESS UPGRADE - Peel-and-stick design means zero hassle, zero tools, all impact.
HEAT SHIELD MASTERY - Reflects up to 97% of engine heat, preserving your hood’s flawless finish.
QUIETER DRIVES AHEAD - Sound Soaker foam slashes engine noise for a peaceful cabin vibe.
MADE IN THE USA SINCE 89 - Legacy of quality and innovation you can count on every mile.

Dynamat Hoodliner is a premium 12 sq ft noise and heat insulation kit designed to reduce engine noise by up to 97% and reflect radiant heat to protect your car hood’s paint. Featuring a 1mm reinforced aluminized skin and Sound Soaker foam, it installs easily with self-adhesive backing. Trusted by automotive pros and made in the USA since 1989, it’s the go-to solution for a cooler, quieter ride.

Specifications

ASIN	B00069QLVC
Best Sellers Rank	#56,627 in Automotive ( See Top 100 in Automotive ) #127 in Automobile Insulation
Brand Name	Dynamat
Coverage	Approx. 1728 sq inches
Customer Reviews	4.6 4.6 out of 5 stars (606)
Global Trade Identification Number	00769103119056
Item Dimensions L x W	137.2L x 81.3W centimeters
Item Thickness	1 Millimeters
Manufacturer	Dynamat
Manufacturer Part Number	11905
Material Type	Polyethylene (PE)
Model Number	11905
Recommended Uses For Product	car
UPC	769103119056
Unit Count	1 Count

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$311.17

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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