What is the Difference Between the K-Source Universal Towing Mirrors

Updated 11/17/2025 | Published 12/13/2024

Products Featured in This Question

K-Source Universal Dual Lens Towing Mirrors - Clip On - Pair

(866)

$117.35

K-Source Universal Towing Mirrors - Clip On - Convex Mirror - Qty 2

(1712)

$89.86

Question:

difference between KS3990 and KS3891-2 PLEASE

asked by: Jack

Expert Reply:

Hey Jack,

The difference between the K-Source # KS3990 and K-Source # KS3891-2 is the first one has dual lenses while the second one has single lenses. I've messed with both of these and the dual lenses are definitely better because you get to adjust both of them individually. This maximizes your viewing angles so you have a safer towing experience.

I actually got the opportunity to test fit these on a 2019 Audi Q7 so I'm attaching that video to this page for your reference.

expert reply by: Jon G

Dual Lens K-Source Towing Mirror
(click to enlarge)

Single Lens K-Source Towing Mirror
(click to enlarge)

Jon G.

11/17/2025

Hey Jack, how did things go with the dual lens towing mirrors on your setup? Your feedback could really help others deciding between the single and dual lens options.