simi valley performance shop

Simi Valley Performance Shop

Founded in 2017, Powerhouse Performance is located at 4532 Industrial St. Simi Valley, CA 93063 as a Simi Valley performance shop. We have spent the last 2 years delivering auto repairs, wheels/tires, performance upgrades, custom vehicle restorations, fabrication and much more to satisfied customers. So, come see us for exceptional customer service, great pricing, and a family environment.

From the time we first opened the doors, we have provided the Ventura and Los Angeles county area and beyond with the latest products and unprecedented service for everything we sell. Because of this, time and time again, our customers have been coming back. Whether they are continuing their current build, starting a new one, or simply getting a maintenance service such as an oil change, new tires and brakes, Powerhouse Performance has proven to be a trusted one-stop shop.

LS Swaps and more!

From low-mileage take outs, to brand-new LSX's and everything in between, Powerhouse Performance is known for LS swaps! If you want to drop in an LS, we can do it for you! Are you looking for an LS for you DIY project, we can help with that as well!

We don't only specialize in LS swaps! From building full custom restorations to installing lift kits weekly and everything in between. At Powerhouse Performance, we can take care of it for you!

simi valley performance shop
simi valley performance shop

Thomas Stevens

CEO, Powerhouse Performance Inc.
Thomas is the owner/operator of Powerhouse Performance Inc. Thomas has a strong background in the Aftermarket Automotive Industry. He has worked for Leading companies in the industry such as Magnuson Superchargers. Thomas has been in the Automotive industry for the last 10 years.


Lead Diesel Mechanic
Chad grew up in Ojai and has a love for diesel. Having attended several Ford Motorcraft training seminars, he is a certified Ford diesel mechanic with over 12 years or experience.


Lead Fabrication Specialist
With years of experience and his extensive knowledge in the fabrication world, Nick is the lead fabricator here at Powerhouse Performance.


Dave has an extensive background being a mechanic.


Shop Hand
From cleaning to mechanic work, David is a great addition to Powerhouse.


Shop Dog
Mostly sleeping throughout the day, Maggie is the only one here not hard at work all throught the day!