Billy Reilly specializes in Custom Axles, Suspension, Exhaust, General Maintenance, Brakes, Diagnostics, Upgrades, Install, Power adders, Repair, and more for Cummins Diesel, Ford Mustangs, and Jeeps.

We also sell aftermarket parts!

Contact Billy for information.

Phone: 302-217-1178


Hours by appointment Only • Located in Milford Delaware



We sell 100s of Name Brand Aftermarket Parts • Shop Tax Free Delaware Contact Billy for a free consultation!


We love our clients! Here's what our clients are saying.

James Tribbitt

Positive: Professionalism, Punctuality, Quality, Value

Billy with Highbred Autosport is a true mechanic who knows his stuff because he loves what he does and cares about detail. I used him to repair a pulley arm, water pump, and thermostat and he was super honest, handled the transaction very fairly.

Vlad T

The best Customer service I have ever received! Got a lot of updates and pictures of the process and the work he was doing. Really fast and amazing quality work even went out of his way to explain to me how everything works in the differential and how he set it up specifically for my application.

Joe Phillips

I'm a new customer and believe me, I will go no where else now. I was referred by a friend after a few discouraging estimates from others. If you are looking for someone honest and knowledgable - this is the place to go. Thank you Bill!

Mar a Vista Joinville

Positive: Professionalism, Punctuality, Quality, Value

Excellent store. Prompt reply! Nice experience. Highly recommend.

Forrest George

Positive: Professionalism, Punctuality, Quality, Value

Excellent service. Bill is very knowledgeable and genuine. Highly recommend.

Kay R

If anybody ever have problem with car at all. I highly recommend this place I know him by the name of Bill a well professional mechanic, technician. He's a genius and know exactly what is doing to get your problem solved.

Paul K

First time customers with Bill. Excellent service along with caring attitude. We would highly recommend to anyone looking for car repair or service. We will be back. Worthy of all 5 stars.

Mitch Losh

Let’s start with customer service, very pleasant experience from the jump. Bill answered all of my questions without a doubt. Quality of repair is outstanding and my wheels are rolling again. I would recommend High Bred Horse Racing to anyone and everyone.

Julie Campbell

Went in for oil change, and upon inspecting the car I was notified that I needed new rear brakes. The tires were also rotated and I was given a very detailed invoice on the service provided. I am very impressed with the detailed work.

Travis Holleman

Met Bill through a vehicle purchase. Bill is super friendly, thorough, and frankly went above and beyond with the work he put into the truck I bought from him. He was very flexible the entire process and wanted to ensure I was completely satisfied.


Had a custom rear end built for my fox body mustang. Bill did an excellent job. Very timely and professional, quality workmanship and parts. Stayed in in constant contact with pictures of the build as it progressed.

Clayton Caudill

Beyond satisfied with the work Billy did on my 01 GT. The man knows more about Mustangs then Ford themselves! My transmission was starting to slip on first gear and I contacted him a few months ago, he gave me and estimate.

Kevin Cole

Excellent service in a timely manner, good communication. Bill has done most of my suspension work and repairs, clutch replacements, etc. Good guy to do business with!

Matt Rycewicz

Absolutely awesome differential builder with attention to detail that is second to none. Highly recommend to anyone looking for this type of work.

Joseph Herriman

Excellent service, had the rear in my tahoe rebuilt. Phenomenal job done when rebuilding the rear.

Devin Hull

Positive: Professionalism, Punctuality, Quality, Value

Did an amazing job installing my Mishimoto radiator in my 2018 mustang. Also helped fix my warped rotors so I no longer feel my car shaking every time I hit the breaks! Highly recommend!!!

James Knapp

Positive: Professionalism, Punctuality, Quality, Value

One of the easiest people to work with. Knows his stuff and is passionate about his work. Hands down the best service and work you can ask for!!!

Kenner Saravia

Positive: Professionalism, Value

Very professional and passionate of his work will definitely be taking my car there more often

Pat Kisela

Positive: Professionalism, Punctuality, Quality, Value

Great customer service, 100% honest and takes pride in your vehicle and will do whatever it takes to help

Rich Miller

Needed some repair work done on my car. Brother-in-law highly recommended Billy so took my car to him. Glad I did, excellent quality of work, and outstanding customer service. Is passionate about his work and it shows. Billy sent text and photos of work in progress. I just found my new mechanic. I highly recommend Highbred Autosport.

Rich O

I would like to say i met my new mechanic!

I broke down in Lewis Del. and was very nervous on contacting a mechanic i didn't know in that area as some tend to take advantage of the situation.

Alexis Roberts


My family has been taking their vehicles to Bill and highly recommended I take my vehicle to him as well.

Chris Miller

Excellent Service, Honest, Friendly and Reliable! My family had a run of automobile issues and needed to find a reliable mechanic. We chose Highbredhorse Racing and I am glad we did! Great customer service, knowledgeable, and fast.

Lisa Reilly

Excellent customer service, quick turnaround and great prices. Billy did an oil change and brakes on my Mercedes - did an excellent job! He was able to upload the maintenance work he did to the Mercedes Maintenance website with his scan.

Christie Thomas

Excellent service! Quickly diagnosed and resolved (within a week). Couldn't be happier with quality of service and the repair. I will definitely return for maintenance and any other repairs.

Hunter Reynolds

I have known Billy personally for a couple years now and he is by far one of the best mechanics I have ever seen. He takes pride in his work. Which is something you cannot find too much of now a days.

Team Green

Billy @ Highbred Autosport has been able to take care of my diesel truck issues at a moment's notice. He goes above & beyond to meet your auto repair needs.

Matt Patt93

Fast, done right, and reliable. Great service from this guy!

Lauren Rentz

My daily driver is honestly always breaking and regardless of my available time period, my truck always gets fixed perfectly. Extremely helpful, knowledgable and professional. I would highly recommend to anybody who needs work done on any model of vehicle, I am always pleased with the result.

Charlie Dickerson

Excellent service

Bill built a narrowed rear for me. I've had absolutely no problems. He is very knowledgeable and takes pride in his work. During my build he stayed in constant with me the whole time.

Victor little

Only a select few people I trust in this Industry and this man is #1 on my list !!!

Odin Prime

Positive: Professionalism, Punctuality, Quality, Value

If you need anything done to your vehicle this is the place to go! Very good work and very professional.

Alex McClure

Bill at Highbred Autosport was the most professional and honest mechanic I have ever used. He diagnosed my issue very quick and told me what it would take to fix. My Jeep runs better than ever and every vehicle I have will be going to Bill.

Chuck Culotta

The reviews for this place are accurate. Bill took my truck in on short notice for what was supposed to be a quick brake job. Unfortunately it became more involved with needing a vacuum pump and power booster.

Danielle C Henry

Bill Rocks! Great customer service, extremely knowledgeable, can diagnose issues fast. A man you can Trust!! If you may need a Great mechanic , I Highly Recommend Highbred Autosports!!

Alex Meade

Bill is a great guy. Helped me out when I was broke down on the side of the road. Got me goin and back on the road. Good people like that are rare to come by these days.

Cody Truitt

Bill does incredible work.. I recently threw a rod in my 2002 explorer and Bill helped us decide what to do.. Long story short Bill ended up swapping engines in it and the car drives like new.. Amazing work and attention to detail.. Hes also the ONLY person I will let touch my mustang!

Chad Killen

Billy did an excellent job repairing my radiator cooling fans! Great attention to detail, quick turn around time, and always easy to get a hold of for questions. Would highly recommend!

James Starecheski

Great place and honest

Damien Keith

Dude was awesome! Not only was he fast and friendly. But my tags were expired due to emissions failure he fix the problem and went to the dmv for me. And any one that will go the extra mile and deal with the dmv for you is good in my books. Definitely recommend this guy. Oh and I forgot to mention very fairly priced!

Rebecca Tooze

Good work. Quick service. Fair price. I’m happy with what I paid for and will be bringing Billy my business in the future.

Mike Corrin

Meticulous work, great communication, prompt service. Highly recommended.

Corey Harrison

Bill does an awesome job. Fast, reliable, and respectful business. Highly recommended.

Brian Losh

Bill build a hybrid 8.8 for my Firebird. Great customer service and always in contact to make sure you are getting what you want. Nothing but quality. Would recommend to anyone.

Bryan Schell

I have an F-350 that I had serious issues with the dealership cannot help me with my problem Billy was able to fix everything wrong with my truck and make it like new again I would recommend him to anyone

Brian Williams

Bill completely rebuilt the 8.8 for my mustang . He did an outstanding job for a great price and the turnaround time was extremely fast ! In today's world Bill is one of those extremely rare people who actually does what he says.

Chris Lynn

Honest and thorough! Quality cant be rivaled! What more can you ask for??

Gordon Massey

Billy did an excellent job with the completely destroyed differential i handed him. Couldnt have been any easier to deal with and was in constant contact with me. I assumed hed have my truck for a week or so.. dropped it off saturday morning and picked it up sunday nignt.. extremely fair pricing to. Would recommend to anybody

Bill Reilly

Phone: 302-217-1178


Hours by appointment Only • Located in Milford Delaware

Copyright 2022 •

Galatians 6:9-10