Exhaust› Exhaust Pipes, Systems and Components

Two Step Performance

High Efficiency Downpipe

$974.76

SKU: TSP-DWN-01-02

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

Moderate — 2–4 hours

Description

The Two Step Performance High Efficiency Downpipe is constructed from 304 stainless steel and features a 4.5-inch outer diameter with a 400 CPSI GESi G-Sport catalytic converter. Designed for Honda and Acura 1.5T engines, it provides increased airflow and power without requiring a tune and won't trigger a check engine light. This downpipe is compatible with both factory and most aftermarket exhaust systems, offering improved response and power delivery. It utilizes an investment cast inlet with CNC pocketing to blend turbine and wastegate flow smoothly into a tapered outlet, promoting efficiency and reducing exhaust gas temperatures. The welds are back-purged for enhanced heat tolerance and durability. It includes gaskets, stainless hardware, and an O2 sensor harness extension, and comes with a 24-month warranty on welding.

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

BrandTwo Step Performance
Part NumberTSP-DWN-01-02
CategoryExhaust

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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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