Air and Fuel› Performance Packages

GrimmSpeed

Stage 1 Power Package

$555.00

SKU: grm191015

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
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Overview

The GrimmSpeed Stage 3 Power Package is a complete system designed to work together for increased performance in your 2015-2019 Subaru STi. This package includes a 3-Port Electronic Boost Controller for accurate and responsive boost control, a Stealthbox Cold Air Intake to reduce pre-turbo restriction and decrease spool time, and a Catted Downpipe for smoother exhaust gas flow. It also features a Top Mount Intercooler, Splitter, and Heatshield to further enhance engine performance.
Show original supplier description
The GrimmSpeed Stage 1 Power Package is engineered to work seamlessly as a complete system, offering an excellent starting point for modifying your 2015-2021 Subaru WRX. This package includes the GrimmSpeed 3-Port Electronic Boost Control Solenoid, designed for more accurate and responsive boost control, which is essential for professional tuning. It also features the GrimmSpeed Cold Air Intake System, which minimizes intake restriction by reducing pre-turbo blockage, allowing your turbo to build boost more quickly and efficiently. Key features of this package include a decrease in spool time and improved boost control from the solenoid, which keeps boost in the system rather than bleeding it off like the factory configuration. The solenoid's fast and precise response is a valuable tool for fine-tuning your boost curve. The Cold Air Intake works by decreasing restriction before the turbo's compressor, increasing its efficiency and enabling faster and higher boost pressure build-up. Installation is designed to be straightforward, with GrimmSpeed providing written and video guides, estimating around 60 minutes for completion. It's crucial to note that all GrimmSpeed Staged Power Packages require a proper tune after installation to achieve optimal performance and ensure compatibility. The package is explicitly designed for the 2015-2021 Subaru WRX model.

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

BrandGrimmSpeed
Part Numbergrm191015
CategoryAir and Fuel
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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.

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