Platforms we tune :

Nissan RB, SR, KA, VQ, VG and Toyota JZ, 7M, 3S Series Engines (Built Honda B, K, J series on a Link ECU only)

We are a Certified Installer, Authorized Dealer and Pro Tuner for the following engine management systems :

Link ECU, Haltech, ECU Master, AEM V2 and Infinity, Emtron, EcuTek, UpRev

We do not tune any domestic platform, however, dyno rentals are available.

Yes. We are appointment only.

While we do have some inventory in the shop if you are local to us you can drop in.

We will not be able to look at your car or give you assistance if you do not first have an appointment.

Fill out the contact us form or give us a call M-F 9am to 5pm at (302) 553-3122 to get in contact with us/schedule appointment.

Yes. When scheduling your appointment we will send you a deposit request.

Tunes only: A $300 non refundable deposit is required before scheduling your tune. This deposit is credited to your invoice not additional. Once deposit is paid we will schedule your appointment.

For drop off appointments: Your deposit amount based will be based on your quote (parts needed, machine work etc.)

*If you need to reschedule your appointment the deposit will carry over/apply to your new appointment.

**If you decide to cancel your appointment (without rescheduling) or if you miss your appointment with no notice there will be no refund.

We always recommend having a vehicle towed if the car is not running at 100%. You don’t want to cause/further damage your engine.

Whether your car is not running/not running right, or you live 100+ miles from us, we accept cars from all over the USA.

Information for shipper:

Your car can be towed to us M-F 9am-4pm. Special arrangements can be made with adequate notice.

Commercial address

30 Albe drive, Suite C

Newark, DE 19702

Ph: (302) 553-3122

Depending on the queue, and the level of the build. We are currently not accepting any new engine builds until December 2025.

6 months to 1 year -realistic timeline including machine shop (3 mos)

Sleeper Spec’d engine build- blueprinted in house. Machined with Roche Racing engines, assembled in house, installed by us. First start-dyno tune process in house.

After you receive your ECU we will provide you with your unlock code.

In order to get your unlock code we will need you to produce the serial number.

To produce your serial number: Download PC Link software and connect your computer to your new Link ECU. You can find the serial number under Help > ECU Information

Email sales@sleepertuning.com or Text (302) 553-3122 . Include your name, order number and attach the photo of your serial number.

At this time we are not hiring, but if you are interested in sending over your resume you can do so sales@sleepertuning.com