Ignitions and Electrical› Computers, Chips, Modules and Programmers

RENNtech

HHT ECU Upgrade

$2,945.00

SKU: M159-10-19700

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The RENNtech HHT ECU Upgrade is a performance tuning module for the 197 - SLS AMG. It provides an increase in horsepower and torque, boosting the vehicle to up to 593 HP and 495 LB-FT. This upgrade utilizes a handheld tuner that allows for seamless switching between the tuned and stock ECU programming without requiring the ECU to be removed.
Show original supplier description
The RENNtech HHT ECU Upgrade is a performance tuning solution specifically designed for the 197 - SLS AMG model. This system delivers significant gains in horsepower and torque across the entire power band by optimizing ignition timing, throttle mapping, air/fuel ratios, and the engine's rev limiter. The upgrade culminates in a peak output of up to 593 HP and 495 LB-FT, a notable increase from the stock 563 HP and 479 LB-FT. Utilizing the RENNtech HHT (Hand Held Tuner) module, users can effortlessly switch between the RENNtech tuned file and the vehicle's original stock file. The module connects directly to the OBD2 port, allowing for programming in a matter of minutes. This feature provides the flexibility to reflash the vehicle's ECU as many times as desired, ensuring adaptability for various conditions or preferences. With extensive experience in ECU tuning dating back to the mid-1980s, RENNtech ensures that their proprietary ECU upgrade not only delivers impressive performance enhancements but also maintains rock-solid daily driver reliability.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRENNtech
Part NumberM159-10-19700
CategoryIgnitions and Electrical
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy