K&N 71-2556 Cold Air Intake System with Dry-Flow Filter

The K&N 71-2556 cold air intake system is listed for select 2004–2008 Ford and Lincoln vehicles. Its reusable Dry-Flow filter, claimed airflow and sound changes, and vehicle-specific fit make compatibility and maintenance important considerations before purchase.

At a glance

The listing describes a reusable filter made with two layers of pleated synthetic media.
K&N claims the intake is dyno tested and increases horsepower and torque. No specific gain figures are provided here.
The listing says installation typically takes under 60 minutes with basic hand tools.
The manufacturer claims a louder engine growl during acceleration that quiets at speed.

Price

$338.30Save 28%

Reference price: ~~$472.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

Reusable filter design may suit owners who prefer cleaning and reusing a filter rather than replacing it.
The listing includes vehicle-specific fitment claims and step-by-step installation instructions.
K&N says the system can be used on a stock tune without ECU modifications.

Cons

Filter care is still required. The stated 50,000-mile cleaning interval applies only under normal highway driving conditions.

Technical specifications

8 specifications

Identity
Brand	K&N
Model	71-2556

Dimensions and installation
Form factor	Oblong
Weight listed	6.14 kg

Fitment and filter
Filter cleaning interval claimed	only needs cleaning every 50,000 miles under normal highway driving conditions
Installation time claimed	less than 60 minutes with basic hand tools

Warranty and origin claims
Warranty description	1,000,000 Miles
Manufacturing origin claimed	Made in the USA

What to know before buying

The listed fitment covers select models and years, not every Ford or Lincoln vehicle. Confirm the exact vehicle and engine fit before ordering. The horsepower, torque, towing and filtration benefits are manufacturer claims, not independently verified results. The listing describes both a 1,000,000-mile warranty and a No-Hassle Lifetime Limited Warranty, so confirm the applicable warranty terms.

What’s in the box

Included

Performance intake kit
Ford F-150 application, V8-5.4L, 2004–2008

Who is it for?

A good fit for

Owners of a listed compatible vehicle seeking a reusable intake filter and intake-system replacement.
Drivers interested in the manufacturer-claimed airflow and engine-sound changes.
Owners comfortable with periodic filter cleaning and checking exact vehicle fitment.

Less suited to

Buyers whose vehicle or engine configuration is not confirmed compatible.
Drivers seeking documented, vehicle-specific horsepower or towing gain figures in this listing.
Owners who prefer an intake filter requiring no cleaning or upkeep.

K&N 71-2556 Cold Air Intake System with Dry-Flow Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 26 ratings

5 stars64%64%
4 stars14%14%
3 stars7%7%
2 stars11%11%
1 star4%4%

Customer feedback highlights ease of installation, perceived performance improvements and a louder engine sound. Those reports may matter to owners considering this intake for a compatible vehicle, but they do not establish a particular power or mileage gain. Aggregate ratings are generally favorable but include a meaningful spread of lower ratings, and the available feedback does not explain their causes.

Positive themes

Customer feedback reports that installation is easy.
Customers mention performance and sound positively. One report describes increased power and mileage, while another notes a louder engine roar.

Frequently asked questions

Which vehicles does the listing identify as compatible?

It lists 2004–2008 Ford F-150, 2006–2008 Lincoln Mark LT, 2004–2007 Ford Lobo and 2005 Ford Expedition. Check fitment for your exact vehicle and engine before buying.

Is the filter reusable?

Yes. The listing calls it a reusable Dry-Flow filter with two layers of pleated synthetic media. It says cleaning is needed every 50,000 miles under normal highway driving conditions.

Does the listing provide a specific horsepower gain?

It claims increased horsepower and torque and says testing is performed on a wheel-based dynamometer, but no gain figures are supplied in the provided details.

How long does installation take?

The listing estimates less than 60 minutes with basic hand tools and says step-by-step instructions and necessary parts are included.