Certified Performance Vehicle Modification Services

636 356-4200     1030 Industrial Court   Moscow Mills 63362     Hours: Monday - Friday 8 a.m. - 5 p.m.   Closed Weekends

Certified Performance Is All About Performance MODS

  • Lift Kits
  • Performance Exhaust
    • Headers
    • High Flow Mufflers like MagnaFlow and DynoMax®
  • Cylinder Head and Cam Shaft Upgrades
  • Rear Differential Mods
    • Posi Unit/Limited-Slip
    • Lockers
    • Spools
  • Suspension Conversions
    • Coil over conversions
    • Tubular control arms
  • Total Engine Conversions

Specializing in lift kits!

What does a Suspension Lift Kit do?

1. Clearance
For starters, one of the foremost reasons for installing truck suspension lift kits is to raise the height of your ride off the ground to enable steeper ascent or descent off-road, and higher ground clearance. In general, it makes sense that when driving over boulders, slogging through mud, coasting across the desert, or even just making your way through the occasional forest trail, higher clearance facilitates negotiating certain obstacles. This can often be a tricky bit of artistry to manage, as higher clearance also raises your vehicle’s center of gravity, which can reduce handling.

2. Larger Tire Fitment
The general consensus suggests that larger tires equate to more traction, right? Well, not entirely. While larger tires may provide some improvement to traction in off-road conditions, there are other ways to improve a vehicle’s traction that are far more efficient than simply bulking up the rubber. Aside from the obvious stylistic discretion, the main reasons for adding larger tires are for higher vehicle clearance for improved performance in mud, deep snow, rocks, and deeply rutted trails. Certain tires designed specifically for off-road conditions can improve traction depending on the circumstances, but the added clearance is the most immediate and direct benefit of larger tires.

A Beginner's Guide to 4x4 Suspension Lift Kits

An article that covers a lot of subjects such as why should I lift my ride, style, performance, factors to consider
with truck suspension lift kits and i
nstalling suspension lift kits.

Truck Lift Video

Our Customers Are Kind Enough to Share …

"For everyone at Certified,
I just wanted to take this opportunity to let you know how much I appreciate you for the honest, fair and reliable service you provide. When my husband Brad and I moved to Troy from St. John one of our biggest concerns was that we wouldn’t be able to find anyone that would even come close in comparison to the trustworthy service you all provide. I am sure you can imagine how excited we were to receive notice that you were moving to Moscow Mills! It was like our prayers were answered and they have been.

You should all be very proud of the quality work and excellent service you provide as well as the fact that your customers are receiving trustworthy & reliable care. These are all very rare traits nowadays and I never hesitate to promote you to anyone looking for a mechanic they can trust. You guys are the best and you can bet that we will be customers for as long as you’ll have us.

Keep up the good work guys (and gals)!!!!"
Debby & Brad Koehler


In the early 20th century horses were causing so much pollution with their poop that cars were seen as the “Green” alternative.