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 reduction

🔥Reflects 97% radiant heat

🛠️Easy peel-and-stick install

373511CFA

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Description

🚗 Silence & Coolness, Wrapped in One Sleek Sheet

EFFORTLESS INSTALLATION - Peel-and-stick design means no hassle, just instant upgrade.
HEAT SHIELD FOR YOUR HOOD - Aluminized skin reflects up to 97% of engine heat, preserving your paint’s flawless finish.
DURABLE WEATHER RESISTANT - Water and oil resistant with easy-to-clean surface, built to last through all seasons.
QUIETER DRIVES ELEVATED FOCUS - Sound Soaker foam absorbs engine noise for a serene cabin vibe.
PRO GRADE QUALITY TRUSTED LEGACY - Made in the USA since 1989, favored by top custom builders and car enthusiasts.

The 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’s hood paint. Featuring a 1 mm reinforced aluminized skin and Sound Soaker foam, it offers professional-grade durability and easy peel-and-stick installation. Trusted by automotive pros since 1989, this USA-made solution transforms your driving experience with quieter rides and cooler engine bays.

Specifications

ASIN	B00069QLVC
Best Sellers Rank	#44,481 in Automotive ( See Top 100 in Automotive ) #93 in Automobile Insulation
Brand	Dynamat
Brand Name	Dynamat
Coverage	Approx. 1728 sq inches
Customer Reviews	4.6 out of 5 stars 607 Reviews
Global Trade Identification Number	00769103119056
Item Dimensions L x W	137.2L x 81.3W centimeters
Item Thickness	1 Millimeters
Item thickness	1 Millimeters
Manufacturer	Dynamat
Manufacturer Part Number	11905
Material	Polyethylene (PE)
Material Type	Polyethylene (PE)
Model Number	11905
Product dimensions	137.2L x 81.3W centimeters
Recommended Uses For Product	car
Recommended uses for product	car
UPC	769103119056
Unit Count	1 Count

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373511CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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