SPDZ1 Racing Downpipes B46 2016 – 2021 BMW 120i, 220i, 230i, 320i, 330e, 330i, 420i, 430i, 630i, 730i & xDrive G & F Chassis
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
SKU: SPDZ1-B46-GSERIES
SPDZ1 B46 Stainless Steel Downpipe Upgrade – BMW G20 320i xDrive (B46 Engine) 2019+ BMW 320i xDrive (G20 Chassis)
Unlock hidden power and improve turbocharger response with the SPDZ1 High-Performance Downpipe Upgrade for the BMW B46-powered G20 320i xDrive. Designed for enthusiasts seeking optimal performance and reliability, our downpipe dramatically improves exhaust flow by removing the restrictive OEM catalytic converter—maximizing efficiency and enhancing sound under boost.
Engineered for Precision. Built for Power.
Key Features:
-
CNC-Crafted for Direct Fitment
Designed using 3D scans and CAD modeling, the SPDZ1 downpipe offers true plug-and-play fitment with factory turbo and exhaust components. No cutting or welding required. -
Mandrel-Bent T304 Stainless Steel Construction
Built from 100% mandrel-bent T304 stainless steel for unmatched durability, corrosion resistance, and heat resilience. All welds are TIG-finished by skilled fabricators to ensure long-term performance under high-load conditions. -
Optimized Internal Diameter
Flow-optimized piping reduces backpressure and increases exhaust velocity, improving turbo spool and minimizing turbo lag. This results in noticeable horsepower and torque gains when paired with tuning. -
Aggressive Exhaust Note
Enhances the auditory experience of your BMW with a deeper, more refined tone under acceleration—without introducing harsh cabin drone. -
Dyno-Tested Performance Gains
Gains of 20–30+ horsepower and torque are achievable when combined with supporting mods and ECU calibration. -
Includes All Necessary Hardware
Comes with high-temperature gaskets and reinforced mounting hardware for a complete installation. - includes heavy duty gasket for Free!
Product Specs:
- Engine Compatibility: BMW B46 2.0L Turbocharged I4
- Chassis: G20 BMW 320i xDrive (2019+)
- Material: T304 Stainless Steel
- Configuration: Catless (Race Use Only)
- Install: Fully reversible; bolts to stock or aftermarket exhaust systems
Important Note:
An ECU tune is strongly recommended to prevent CEL (Check Engine Light) and to extract full performance benefits.
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Our History
For 23 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.