Level 1
Gen V
~580 RWHP
- Long tube headers
- High flow cats
- Cold air intake
- HP Tuners ECU unlock and tune
General maintenance, custom fabrication, performance upgrades, and motor swaps, with quality parts from names you already know.
Supercharger kits and custom turbo setups. Already bought a kit? Bring the car and the box and we'll put it on.
We build a plan that fits your goals and budget and only use brands that hold up.
Over 25 years building high-horsepower GM engines, from stock rebuilds to LS and LT combinations past 1,000 horsepower.
MoTeC, Haltech, Holley Terminator and Dominator, and FuelTech installs, plus custom wiring harnesses for Chevrolet, Mopar, and Ford builds.
Altitude Speed offers bolt-on upgrades, from headers and tuning on the stock ECU to an in-house custom twin turbo kit for Gen 2, 3, 4, and 5 Vipers, and anything else in between.
Build sheet coming soon.
Build sheet coming soon.
Altitude Speed is partnered with Race Ready Tuning on their C8 packages for the 2020 and newer Corvette Stingray and E-Ray, from a bolt-on Level 1 to a 1,000+ horsepower twin turbo build.
See the packages at Race Ready TuningEvery package includes professional installation and a custom dyno calibration. Power figures and pricing are Race Ready Tuning's.
Prices and specifications are from Race Ready Tuning's listings as of October 2026 and can change. Their site has the full parts list for each package.
Fabrication is what we're known for. We make sure your car has exactly what it needs to perform, built to fit your car and nobody else's.
Turbocharged or supercharged, a better intercooler and charge piping pays off in power, throttle response, and consistency. We build the kit to fit your engine bay.
Suspension fabrication built to fit your frame, from shock tabs and coil-over mounts to control arms and chassis work.
Vehicle size, available space, and the fuel you run all change the answer. We build fuel cells in any size or shape to suit the build.
Cracked tubing, leaking radiator pipes, broken brackets. We also make replacement parts like shock tabs and coil-over mounts. If you can name it, we can weld it.
Stainless systems built for your car. Pick the pipe diameter, mufflers, resonators, or straight pipes until it sounds the way you want. Off-the-shelf stainless kits are expensive, so get one made for you instead.
Our fabrication isn't limited to this list. We build custom one-of-one parts for customers every day, from suspension to engine and body fabrication. If you have a custom request, we're all about it.
A Mustang dyno rated to 3,000 HP and 200 MPH, and tuners who work in standalone and factory ECUs every day.
Book the rollers for baseline pulls, before-and-after numbers, or your own tuner. AWD, FWD, and RWD all welcome.
Book dyno timeThe final price depends on your vehicle's make, model, and ECU. Tell us what you have and we'll quote it.
Get a tuning quoteDon't see your setup? Call. The list is longer than this page.
Need the hardware first? We install the ECU and build a custom harness for Chevrolet, Mopar, and Ford builds before it ever hits the rollers.
Altitude Speed builds custom cars around the one you've been dreaming of. From tuning to frame-off restomods, every job gets the same care.
We take pride in the details. Every project is a true representation of what the customer asked for, finished to a standard we'd put our own name on.
We're a small business. We support local events, work with other local shops, and build relationships with customers that last past the invoice.
Platforms and engine management change fast. We keep up with the technology so your build benefits from what works now.
We're a small shop that cares about doing it right: honest work, real attention to detail, and builds that represent quality, just like our customers.
A Colorado native who grew up in the racing community. Garrett learned to weld and wrench young and has been obsessed with modifying cars and going fast ever since, with a firm belief in building them right.
Favorite project: a '67 Shelby AC Cobra he's building with his father. Off the clock he's with his wife Amanda and their dogs, Winnie and Remington.
Welding for over a decade, including years as a structural welder while fabricating on the side. Zach grew up wrenching on his father's classic muscle cars, and a family history of drag racing pulled him into building parts that go faster and look good doing it.
A lifelong Coloradan. Away from the shop he's with his girlfriend Maile and their pup, Ruger.
Fill out the form and it comes straight to us. We'll get back to you with questions, a plan, and a price.
Please note that this number is not text-able. For all questions and concerns please call the shop at 303-469-1749.
By approving this estimate, you also agree to the following terms and conditions.
In no event will Freedom Metal Works DBA Altitude Speed and Fab be liable for any incidental, consequential, or indirect damages.
Warranty coverage applies only to work done on street vehicles. Any work done on vehicles that partake in any type of motorsports or off-roading activities is done so without warranty coverage. Street vehicles that partake in motorsport activities void any warranty originally in place.
All rebuilt, performance, and crate engines are considered motorsports items and will be treated as such for the remainder of this disclaimer.
Freedom Metal Works DBA Altitude Speed and Fab supplies parts that are designed and fabricated for motorsports and off-road use only. Use of these products is at the consumer's own risk.
Any performance application motor built for over 600 horsepower will not have a warranty.
Due to the nature of motorsports and off-roading, we can not be held liable for any product failures due to unforeseen events or improper use or abuse of products sold by Freedom Metal Works DBA Altitude Speed and Fab.
Modifications to any vehicle by installing parts sold by Freedom Metal Works DBA Altitude Speed and Fab could alter vehicle's performance in the event of a crash, resulting in property damage, bodily harm, or death. In purchasing from Freedom Metal Works DBA Altitude Speed and Fab, the purchaser hereby assumes full responsibility in any property damage or personal injury that may occur while using products sold by Freedom Metal Works DBA Altitude Speed and Fab.
Freedom Metal Works DBA Altitude Speed and Fab will not take responsibility for personal injury or property damage arising from failure of parts sold by Freedom Metal Works DBA Altitude Speed and Fab. Do not purchase or install any part sold by Freedom Metal Works DBA Altitude Speed and Fab if you do not agree with the above terms and/or you do not feel competent in installing parts and using safely and correctly. Improper installation can lead to personal injury, death, or property damage; a qualified professional should install all products.
Most products are intended for motorsports and/or off road use and may not be legal where you reside. Consult your owner's manual, instructions for each product, as well as all laws before undertaking these modifications. The owner and user are solely responsible for the legality and safety of the vehicle you modify using these components.
Any failure due to actions outside of your control, such as: other people working on your car, manipulation of tuning data/ECU, failure to follow engine break-in procedure, running low on fluids, pre-existing problems or abuse, will solely be at the cost of the owner.
If an issue arises, Freedom Metal Works DBA Altitude Speed and Fab should be the first contact to diagnose the problem. If other people work on or inspect the issue before Freedom Metal Works DBA Altitude Speed and Fab has an opportunity to, we are no longer liable for any repairs or associated costs. If Freedom Metal Works DBA Altitude Speed and Fab is the first to inspect the problem and failure was caused by assembly by Freedom Metal Works DBA Altitude Speed and Fab, we will warranty the repair.
We do not offer any warranty or refunds expressed, or otherwise implied on any modified and/or aftermarket parts/parts supplied by us. Only unmodified, stock parts will be returnable for warranty and final authorization is up to the parts supplier.
Any and all customers approve this agreement with full knowledge and understanding of this document by conducting work with Freedom Metal Works DBA Altitude Speed and Fab, utilizing our website, and purchasing parts from us.