We’ve been asked if we also manufacture the Kenworth T300 & T370 heater box. The answer is, yes we do! Our aftermarket 100%stainless steel heater box will replace your OE T300 or T370 box.

SKU: F31-1037ss-2 Category:

Alternate Part Numbers:F31-1037-1, F31-1064-12101, F31-1220-12101, F31-1291-22201, F31-1064-22201

Additional information

Weight 35 lbs
Dimensions 20 × 15 × 20 in

Made in the USA

Our heater boxes are made with precision right here in Holland, Michigan.

We are a custom metal fabrication shop that has been in operation since 2006. Our favorite metal to work with is stainless steel due to it’s strength and anti-corrosion properties.

Shoreline Kenworth Heater Box Overview

Lifetime Rust-Free Guarantee

Manufactured With 100% Stainless Steel

Matches OEM Dimensions & Connections For Easy Install

Shoreline vs The Competition

This video compares the Shoreline stainless steel Kenworth heater box with one of our competitors. We list a few of the differences below. Watch the video to see all the differences.

The Shoreline box uses stainless rivnuts, while our competitor uses steel.

The Shoreline box is spot welded, while the competition decided to use rivets.

The Shoreline box includes mounting studs for easy mounting; the competitor's box does not.

Our box includes a drip tray; the competitor's box does not.

Happy Customers

“I’ve installed one of your boxes on a customer’s truck. They install nicely and the quality is superb…
I wish I found your product before spending 2 days fabricating one for my KW…
I’ve installed a couple different aftermarket ones. Yours went the smoothest of any.”
Isaac Shoreline Manufacturing Review

Isaac Kohne

Creek Hill Farms LLC
“Just finished an install for my 02′ KW T800. Installed smoothly with a very little issues. Now have strong heat AND A/C. I shouldn’t have hesitated ordering because the quality is definitely there!.”

John Dobosh

“Ordering the box was easy. The staff at Shoreline helped make this job a breeze. The price is fair and the shipping cost was low considering the quick delivery time. Thanks Shoreline. Great product!”

Dalhus Dewald

Dewald Contracting 

Polished Heater Box
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