Cadillac CT4 2.0T 2020+ Stainless Steel Downpipe

$481.00 USD

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Cadillac CT4 2.0T Stainless Steel Downpipe — Unlock Real Power from the Tightest Point of Your Exhaust

The factory downpipe is the single most restrictive section of the CT4's exhaust. Its cramped, crushing-bent design chokes hot gases right behind the turbo, robbing horsepower and dulling throttle response. The HMD Performance Downpipe replaces it with a free-flowing, mandrel-bent SUS304 stainless steel pipe that unblocks airflow, drops exhaust gas temperature and lets your 2.0T engine breathe the way it should — sharper response, stronger mid-range pull and a deeper, more aggressive exhaust note.

Key Features

Premium SUS304 Stainless Steel, 1.5mm Wall Thickness — wear-resistant, corrosion-proof and built for a long service life
Precision TIG Hand Welding — smooth, flat, double-side reinforced weld seams for maximum strength and durability
FREE Heat Shield Upgrade — effectively lowers under-hood heat radiated by the downpipe, at no extra charge
High-Flow Metallic Sport Catalyst (Cell Options) — palladium & rhodium precious-metal core offers excellent high-temperature durability, maximizing exhaust flow while efficiently cleaning emissions to help meet tailpipe standards
Unblock Restrictive Airflow — replaces the clogged/restrictive factory cat section to restore lost power
100% Bolt-On, No Cutting & No Welding — direct OEM plug-and-play replacement, fully reversible to stock
FREE Laser Logo Engraving — personalize your downpipe with your own logo

Product Overview

Brand: HMD
Fitment: Cadillac CT4 2.0T Turbo (LSY) 2020+
Product Type: High-Flow Performance Downpipe
Product Name: Racing-Grade SUS304 Stainless Steel Downpipe
Vehicle Fitment: Send vehicle details to customer service after order placement
Model Year: Confirm exact vehicle year before purchase
Material: Premium SUS304 Stainless Steel (1.5mm wall, heat & corrosion resistant)
Catalytic Converter (4 Options): No Cats (Off-road / Track use only) | 100 Cell | 200 Cell | 300 Cell — high-flow metallic sport catalyst with palladium & rhodium precious metals
Surface Finish: Polished stainless steel + FREE heat shield upgrade
Welding Process: TIG hand welding, internal & external smooth full weld, crack-proof and ultra-durable
Installation: Direct OEM plug-and-play replacement, no cutting or welding required
Performance Gain: Reduced exhaust backpressure, improved exhaust flow, noticeable horsepower & torque gains
Upgrade Effect: Faster turbo response, sharper throttle feel, stronger acceleration, deeper and more penetrating exhaust sound
Installation Recommendation: Professional installation highly suggested
Custom Service: Free laser logo engraving
Lifespan & Warranty: 2-year official warranty, over 10-year service life
Origin: Made in China
Contact: +86 18924479531 (WeChat / WhatsApp / Kakao Talk)

Emissions & Use Notice

100 / 200 / 300 Cell versions contain a high-flow sport catalytic converter and are intended for off-road, track and motorsport use where local regulations permit. Please check your local, state and federal laws before purchase and installation.
No Cats version is strictly intended for closed track events and off-road use only. It may trigger a check engine light (CEL) on OBD2 vehicles; pairing with performance ECU software is recommended.
All installation-risk and use-risk is borne by the end-user and installer.