For Sale: Dart Iron LS Next, Gen I




1545 Mound Road, Rockdale, IL View Map


Borowski Race Engines, Inc. has been the leader in LS Next engine builds since Dart’s original release of the Gen 1 iron block. We received 3 of Dart’s first batch of 25 blocks. All three of our finished engines ended were subsequently featured in Engine Labs on-line magazine. Since that time, we have built them boosted, sprayed; even boosted and sprayed like the one in the video. The killer twin-turbo 427ci LS7 in the main photo was featured front and center at the Dart booth during PRI2014.

We use these super-stout pieces because we believe they are light-years ahead of either factory or competitive after-market LS blocks as platforms for making >1,000 hp engines. You can read what Dart says down below.

Since getting our first LS Next blocks, we have also been at the front of the line for the Gen1 aluminum, Darton MID sleeved, LS Next2 and SHP variants of the LS Next block family. Within this group, we have built engines using numerous machining upgrades such as 0.5” head bolts and piston oilers to name a few. We know LS Next! If you are thinking about big power, you should talk to us.

Gen1 LS Next blocks come in the following configurations:
Cylinder bores: 4.000” and 4.125”
Deck height: 9.240” and 9.450”
Lifter bores: 0.842”, 0.874” and 0.904”

You can order them “as-is”, or have us finish-machine them for you. We can also hook you up with any or all of the upgrades we use in our engine builds. In fact, we can supply you with anything from unopened-in-the-box to a complete crate engine either fully assembled or as a “build-in-box”. Because we are engine builders with an LS Next focus, we have inventory of virtually everything needed to put together complete LS Next engines in a range of designs. Many of the high-end parts in our inventory have a 4 – 6 month lead time from the manufacturers so we may be the only place to buy them.

You can click the “Buy Now” link to order any of the “as-is” blocks. Please call us at 815-725-2727 to discuss any of the machining options, order other parts or to just ask us some questions.


Here’s what Dart says:

Designed from a clean slate approach the LS Next Iron block has addressed the shortcomings of the LS platform and is the ideal candidate for hot rodders, drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. By utilizing conventional style main caps and oil pans with LS rotating assemblies and related components, Dart has addressed the windage and oil control problems which result from the factory LS engine’s separated crankcase bays.

-Priority main oiling system.
-Siamesed cylinder bores with extra thick walls.
-Cylinder barrels extended .375” at the bottom.
-Extra thick decks ensure reliable head gasket seal.
-Blind head bolt holes don’t go through to water jacket.
-Scalloped water jackets increase flow around cylinders for better cooling.
-Clearance for 4.100” stroke w/ steel rods.
-Splayed outer bolts on middle main bearing caps.
-LS or Gen I style motor mounts.
-Provisions for OE stock roller lifters and cam.
-Uses stock timing covers and stock rear cover.
-All OE bolt holes for starter, water pump, etc.
-Driver or passenger side starter mounts.
-Parts kit sold separately (PN: 32000016).


Borowski Race Enterprises

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

Our state-of-the-art CNC equipment is the most advanced available in the region. The staff boasts more than 100 years of collective experience and include accomplished racers and crew chiefs. This combination of machinery and experience mean that your engine will have more horsepower and reliability. It also allows us to turn your project around quickly.

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

1545 Mound Road
Rockdale, IL 60436

Like us on Facebook at:

Follow us on Tumblr at:

View photos from previous projects at:


Not Accepted
Payment Options
Paypal, Money Order, Credit Card, Cash
Message Seller

Ad #182198565
Expires on: 05/13/2018
Posted: 02/18/2018, ad expires in 79 days
From:    To: 
Message Seller
Business Information
Ad posted by:
BorowskiRace (#327877)

Borowski Race Engines, Inc.
1545 Mound Rd
Joliet, IL 60436
(815) 725-2727

Member Since: 10/23/2008

Enter Friend’s Email:

Report the sale - click here

Email us -
Call us - 866.326.9227 (Toll Free)
Copyright © 2005-2018 All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy

Execution Stats: 0.187 sec / 9.3 MB used / 10.0 MB peak