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Borowski Race Engines, Inc., Rockdale, IL

Custom CNC Engine Builders for Street, Race, Restoration & Marine. Est. 1968.

Our state-of-the-art CNC machinery is the most advanced available. The staff boasts more than 100 years of collective experience and includes accomplished racers and crew chiefs. We are not your usual cookie cutter, generic engine-in-a-box guys, but rather a full custom shop with a focus on American muscle and a side specialty of SCAA spec Miata engines. We marry our engines of all types with Whipple superchargers, Prochargers, Bullseye turbos and nitrous kits for an incredible range of power and performance options.

Dart Machinery has long been our preferred aftermarket block supplier and is the platform for our HellFire® line of semi-custom LS type engines. In our opinion, Dart’s LSNext® blocks are a game changer. The differences relative to a factory LS block are visually obvious. The advantages of these blocks allow us to push the envelope even further for more power and reliability. Our cutting edge LS engine technology has frequently been featured in Engine Labs magazine.

We focus on a limited number of top-quality parts vendors and maintain inventory of the key parts we use. This allows us to sell high-end parts, engines and assemblies on short lead times whereas other engine builders or parts suppliers may be waiting six months for back-ordered products. Our vendors have been carefully vetted, often with on-site visits such as shown in these videos shot at Callies and Bullseye. Our hand-selected manufacturers work closely with us and frequently provide us with their newest technology for market introduction.

In the ads below, you will see everything from bare blocks and supercharger assemblies to representative complete and fully dressed builds that can be ordered and shipped to you. If you don’t see what you are looking for, please give us a call at 815-725-2727 or send an email to

Current list of items for sale

Ad #182794811
POSTED: Sat, Dec 03 2016

Edelbrock Performer RPM aluminum heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants.....


Ad #182781821
POSTED: Sat, Dec 03 2016

For Standard and MID Type Blocks
1/2" studs provide 50% more clamping force than the standard 7/16" studs. This is a really big deal as you start piling on the power. On our builds,.....


Ad #182781858
POSTED: Sat, Dec 03 2016

Also available for 4 bolt/15 side
Dart's LS Next block standard configuration is six bolts per cylinder, 23 per side, 7/16" diameter head studs as shown in the photo above. Be sure to.....


Ad #182781878
POSTED: Sat, Dec 03 2016

Street/Strip Carb or EFI Applications
Free flows 170 gph at 13.8 volts and can support up to an amazing 2,400 carb horsepower at 18.5 volts. Featuring brushless pump technology and a twin.....


Ad #182781907
POSTED: Sat, Dec 03 2016

Available with 102mm Big Mouth Throttle Body
LSXR│Rectangle Port Heads (LS3, L99, L76) From FAST: "FAST" engineers teamed up with airflow specialists at RHS to develop polymer intake manifolds.....


Ad #182795347
POSTED: Sat, Dec 03 2016

Do you love the look of blower sticking out of your hood? Do you love the incredible power you feel when you hit the throttle of a supercharged.....


Ad #182689804
POSTED: Fri, Dec 02 2016

Callies Billet Crank, Dyers Top Billet Rods
BOROWSKI RACE ENGINES, INC. has established its position as the leading builder of Dart LS Next engines by being first in line with pre-production.....


Ad #182199578
POSTED: Fri, Dec 02 2016

Borowski Race Engines, Inc.
We can offer Dart LS Next blocks in any stage of completion from "in-the-box" to a complete crate engine. Our LS Next builds have been featured on.....


Ad #182262565
POSTED: Fri, Dec 02 2016

Borowski Race Engines, Inc.
650HP Dart LS Next LS3, CNC Ported GM LS3 Heads, ARP Head Studs -Dart LS Next Engine Block -CNC Ported GM LS3 Heads Upgraded with PAC Valve Springs.....


Ad #182262566
POSTED: Fri, Dec 02 2016

Borowski Race Engines, Inc.
650HP Dart LS Next LS3, CNC Ported GM LS3 Heads, ARP Head Studs -Dart LS Next Engine Block -CNC Ported GM LS3 Heads Upgraded with PAC Valve Springs.....


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(815) 725-2727
Borowski Race Engines, Inc.
1545 Mound Rd
Rockdale, IL 60436
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Mon - Fri: 8:00 am - 6:00 pm
Sat: 9:30 am - 1:00 pm

The Benefits of a Borowski-Built Engine

1.Custom Made to Your Exact Specifications: With our guidance, you pick the sound, look, power and accessories. We make it happen.

2.Technical Knowledge: We make cutting edge engines for a broad range of motorsports. In season, our staff is at the track and on the water to help keep you ahead of the pack.

3.Machining Capabilities: Our CNC engine machining equipment and shop professionals are second to none. That shows in our build quality, reliability and performance.

4.Quality: Our levels of care and precision go far beyond OEM or standard aftermarket. Machining and assembly of your project is performed only by highly skilled technicians.

5.Predictability: On-time and on-budget

6.Build Time: Thanks to our CNC processes, we can complete machining quickly. We have strong relationships with our key suppliers which helps avoid delay waiting for parts.

7.Transparency: Your entire build is photographed and documented. Progress pictures are uploaded and viewable on our Flickr. You are welcome to visit in person any time and will be invited to attend the video-taped dyno session.

8.Honesty and Integrity as evidenced by our A+ rating and accreditation by Better Business Bureau.

9. Our Warranty

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Call us - 866.326.9227
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