Ignitions and Electrical› Computers, Chips, Modules and Programmers

Speed-Buster

Power Module Kit

$399.99

SKU: 121170-3-450

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Speed-Buster Power Module Kit is a plug-and-play upgrade for the S55 powerplant. It safely and effortlessly extracts more power and torque from your engine. The module works by sending modified signals to the engine computer, safely raising boost levels without triggering torque limiters, monitors, or limp mode.
Show original supplier description
The Speed-Buster Power Module Kit is a simple plug-and-play power upgrade designed to deliver significant power gains for the S55 engine, specifically for Competition and CS models. This module safely raises boost levels by sending modified signals to the engine computer, bypassing torque limiters, monitors, and limp mode. Developed and tuned on Speed-Buster's MAHA dyno in Germany, the programming integrates seamlessly with the factory ECU, offering an impressive increase in power while maintaining factory-level drivability and smoothness. All factory overboost protections are preserved. The installation is straightforward, involving unplugging factory connectors for the camshaft position sensor, boost pressure sensor, and intake manifold pressure sensor, then plugging in the Speed-Buster harness. The harness uses factory-type connectors for a secure, weatherproof, and OEM appearance. The system can be uninstalled at any time, and a bypass plug is included for stock operation without component removal. The module operates independently of the factory ECU, unaffected by software updates, and does not interfere with OBD diagnostics or service functions. This product is intended for vehicles with stock and fully functional emissions equipment. It has not been submitted or tested for approval in California and is not legal for installation or use in California or any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations.

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

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Specifications

BrandSpeed-Buster
Part Number121170-3-450
CategoryIgnitions and Electrical

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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.

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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.

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