Air and Fuel› Performance Packages

MAPerformance

Stage 2 Intake and Downpipe Kit

$977.77

SKU: MAP STI-4G-S2

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The MAPerformance Stage 2 power package is a performance upgrade designed for the 2015-2017 Subaru STI. It includes an air intake system and a downpipe, both constructed from 304 stainless steel with 3" mandrel-bent piping. The components are fully Tig welded and back-purged for durability.
Show original supplier description
The MAPerformance Stage 2 power package is a comprehensive upgrade for the 2015-2017 Subaru STI, engineered to significantly enhance performance and support higher power levels. This package features a MAP STI Air Intake Kit and a MAP Subaru STI Downpipe Upgrade, both constructed from durable 304 stainless steel. The piping is 100% mandrel bent with a 3" diameter to ensure optimal flow, and all welds are fully Tig welded and back-purged for maximum strength and longevity. When compared to a stock STI, this Stage 2 package offers considerable advantages beyond improved sound and raw power. It allows the turbo to operate with less effort and reduces stress on the engine while achieving higher output. The system is capable of supporting up to 331 wheel horsepower and 347 wheel torque, representing an increase of 59 whp and 58 wtq over stock. Included in the box are all necessary hardware for installation. Installation instructions for both the downpipe and the air intake are available for download. The package comes with a MAP Limited Lifetime Warranty. Optional COBB Accessport V3 is also available.

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

BrandMAPerformance
Part NumberMAP STI-4G-S2
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.

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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