Innovative Van Conversion Kits

Everything you'll need to convert your Ford Transit, Ram Promaster, or Mercedes Sprinter. Made in America by expert craftsmen.
Empowering Upfitters

Our mission is to empower upfitters and DIY builders across America in getting more done for less cost in less time.

Are you an Upfitter?
Ask us how we can help bring your total build turnaround time down to 14 days or less.

Vanspeed Trim Rings

Available for Pre-Order

Vanspeed Capsules

Now available for Sprinter & Transit

Sprinter Side Steps

Easy to Install | Built to LAst

Defender Bumper

High Quality | Built for Adventure
Place in your vehicle
See our products in 3D

We've utilized Augmented Reality technology to allow you to fit our cabinetry in your vehicle before purchasing.

MASTERFULLY MADE CABINETRY

Handcrafted in the USA

Hear from Happy Customers

★★★★★

"I recently bought a complete kit from SergSupply for my new Sprinter van. I couldn’t be happier! Thier workmanship is fantastic, prices are remarkably low, customer service is simply the best I’ve ever seen."

Greg Miller

Anchorage, AK

★★★★★

"Great product! Very well made and the team was very helpful throughout. Prompt responses and very knowledgeable. I've had no problems at all. Would highly recommend!"

Albert Rodrigue

Yosemite, CA

★★★★★

"I can't even begin to explain how incredible these kits are. Their team is super flexible and easy to work with. Literally makes the hardest part of doing a van build fun and cohesive. The pieces fit together perfectly and the customer service and response time is unbeatable."

Chase Coffin

Santa Clara, CA

★★★★★

"The quality of the work was outstanding. They made adjustments and accommodation for my low roof Sprinter and were very generous with providing materials, thoughtful instruction and creative solutions - will absolutely work with them again on every van build!"

Cambrea Ezell

Seattle, WA

★★★★★

"I have purchased several other items. I would have to say there customer service is excellent and top notch. Also a lot of other companies can learn from them and how to deal with customers and customer relations."

Brian Livingston

Seattle, WA

★★★★★

"So far so good! We installed these last week and they look great. The customer service was outstanding. Most agreeable and helpful. The rings arrived promptly, as promised. Thank you!"

Bill Houston

Dallas, TX

★★★★★

"I took a chance on ordering from Serg Supply - these high-graded, simply elegant and yes finely crafted storage spaces add to the elegance in my van."

Kristine Elite

Nashville, TN

★★★★★

"Just now getting my panels sealed and installed, and everything fits awesome and is super easy to install Thank you!"

Amy Weaver

Fair Oaks, CA

★★★★★

"Ordered three cabinets for our new Sprinter and were not disappointed! Beautiful craftsmanship, quick turnaround time, communicative seller, and more."

Brenda Mann

Steilacoom, WA

Masterfully Engineered
Shower 2.0

TetraVan Shower 2.0 is now available with optional enclosure for a smarter way to shower.