will this fit 2008 gmc sierra Denali?

Depends on how big your intake tube is

Whats the difference with the RR-3003 ?

If your intake tube is 3" or 3.5" or 4" in diameter

Im assuming this is not a hydrophobic (water-resistant/proof,) is it?

It is not. Any open cone filter isn't. If you're going to do an external mod such as out the hood or aft of the front grill, make a shield for it. If you have a truck and you're going mudding and want a custom set up for your Cummins, either create an air box around this filter with a snorkel.

Will this fit a 2013 Dodge Dart with the short air intake?

I'm not sure on your car but the filter have 3 adapters I'm sure will fit the filter did fit on my air intake with no problem the adapters are 3 different sizes

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K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD

K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD

Product ID: 9483371

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Details

Brand
K&N
Product Dimensions
3.5"L x 4"W x
OEM Part Number
RG-1001RD
Global Trade Identification Number
Shape
Conical Oval

🔥Boosts horsepower & acceleration

♻️Reusable, cleans every 75,000 miles

🛡️4-layer premium cotton gauze filtration

Description

♻️ Drive smarter, perform stronger — the last air filter you'll ever need!

LIFETIME DURABILITY - Built with rugged materials and advanced construction to last your vehicle’s lifetime.
ECO FRIENDLY UPGRADE - Reusable design reduces landfill waste—clean only once every 5 years.
UNLEASH ENGINE POWER - State-of-the-art media engineered to maximize airflow and horsepower gains.
PLUG PLAY PERFORMANCE - Pre-oiled and universal fit for effortless installation and instant engine boost.
QUADRUPLE FILTRATION DEFENSE - Four layers of premium cotton gauze trap contaminants for peak engine health.

The K&N High-Flow Original Lifetime Universal Clamp-On Air Filter is a premium, reusable air filter designed to increase horsepower and acceleration through advanced 4-layer cotton gauze filtration. Engineered for durability and universal fit, it requires cleaning only every 75,000 miles, reducing waste and maintenance costs. Pre-oiled and easy to install, it’s a smart upgrade for professionals seeking lasting performance and eco-conscious vehicle care.

Specifications

Brand	K&N
Product Dimensions	3.5"L x 4"W x 3"H
OEM Part Number	RG-1001RD
Global Trade Identification Number	00024844313317
Shape	Conical, Oval, Round
Manufacturer	K&N Engineering
Automotive Fit Type	Universal Fit
UPC	024844313317
Model	Universal Clamp-On Air Filter
Item Weight	10.6 ounces
Item model number	RG-1001RD
Is Discontinued By Manufacturer	No
Exterior	Painted
Manufacturer Part Number	RG-1001RD
Safety Rating	Não aplicável

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