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- VRSF Racing Downpipes B48 G & F ChassisTPS Garage Google Ads & more
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BMW B48 Downpipe Catless & High Flow Catted Downpipe
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Aftermarket BMW B48 Downpipe Catless or High Flow Catted will improve flow and performance. High HP and torque gains. The B48 downpipe fits the BMW 120IÂ ...
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- ApexBuilt B48 GESI High-Flow Catted Downpipe for BMW/GR Supra (2016-2025)ApexBuiltApexBuilt B48 GESI High-Flow Catted Downpipe for BMW/GR Supra (2016-2025)ApexBuilt
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SPDZ1 B48 Downpipe Upgrade BMW 3 Series (330i), 4 ...
Revline Performance
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Revline Performance
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Please note that this downpipe will only fit vehicles with the B48 engine. RHD models will require clearance/modification in order to clear the steering column.Read more
$250.00In stock$31.31 delivery30-day returns
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BMW B48 2.0 Turbo Downpipe - Stainless Steel Catless ...
Nforcd
https://www.nforcd.com › products › bmw-b48-120i-12...
Nforcd
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Ideal for 2016 onwards BMW F series 120i, 125i, 220i and 320i models fitted with the B48 2.0T engine. Track use only. Will not pass an MOT. This decat downpipe ...Read more
£350.0030-day returns
custom 3 series F (B48) 2.0T downpipe,3 series F (B48) 2.0T ...
jagrowtuning.com
https://www.jagrowtuning.com › 3-series-f-b48-20t-dow...
jagrowtuning.com
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Jagrow focus on research & development,production and sales of 3 series F (B48) 2.0T downpipe for many years. Excellent quality,professional after-service.
B46 B48 Racing Downpipe - Supra 2.0T & BMW G / F ...
Palenon Performance
https://palenonperformance.com › products › palenon-...
Palenon Performance
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Our racing-grade downpipes are expertly crafted from premium stainless steel, using precise and standardized bending techniques to ensure optimal performance ...
$299.99 to $444.99In stock$19.99 delivery30-day returns
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Upgrade Your BMW G20/G28 325i/330i with AME ...
AME Motorsport
https://automodexpress.com › products › bmw-3-series-...
AME Motorsport
https://automodexpress.com › products › bmw-3-series-...
Will this downpipe fit my specific BMW 3 Series model? Yes, it's engineered specifically for the BMW 3 Series (G20/G28) 325i/330i with the B48 2.0T engine (2018Â ...Read more
A$511.50In stockFree delivery
People also ask
How much HP will a downpipe add?
Â
Typical HP Gains (Varies by Vehicle & Tune)Â
- Stock Tune:Expect around 10-20 hp with a high-flow catted downpipe, and potentially 15-25 hp with a catless downpipe, say MAPerformance, Project Gamma Intake, Flashark.
- With Stage 2 Tune:Gains can jump significantly, often reaching 30-40 hp (catted) or 40-55+ hp (catless) as the tune optimizes for the increased airflow, according to Flashark.
Factors Influencing Gains
- Tuning:A tune is crucial to fully exploit the downpipe's potential, say Project Gamma Intake, YouTube.Â
- Vehicle & Turbo:Larger turbos and certain models (like WRX, 335i) see bigger gains; some smaller engines might see less, say Flashark https://flasharkracing.com/blogs/news/how-much-hp-does-a-downpipe-add.Â
- Catless vs. Catted:Catless offers maximum flow and power; catted is cleaner and quieter, say Project Gamma Intake, Flashark.Â
How it Works
An aftermarket downpipe replaces the restrictive factory pipe, reducing backpressure on the turbocharger, allowing it to spool faster and the engine to "breathe" better, leading to more efficient power delivery, notes MAPerformance, EuroSport Tuning.Â
An aftermarket downpipe replaces the restrictive factory pipe, reducing backpressure on the turbocharger, allowing it to spool faster and the engine to "breathe" better, leading to more efficient power delivery, notes MAPerformance, EuroSport Tuning.Â
AI responses may include mistakes. Learn more
How Much HP Does a Downpipe Add to a Mk7 GTI? - Flashark
Aug 21, 2025 — Catted vs. ... Choosing between a high-flow catted downpipe and a catless option for the Mk7 GTI largely depends on yo...
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Downpipes: Everything you need to know | MAPerformance
Jan 10, 2022 — Performance catted downpipes nowadays have been shown to increase horsepower. An aftermarket downpipe with catalytic c...
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How Much HP Does a Downpipe Add? - Flashark
Apr 2, 2025 — For most turbocharged vehicles, installing a high-flow downpipe typically results in a 15-30 horsepower increase. This ...
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How Can Catless Downpipes Make Your Car Faster
Sep 28, 2021
Project Gamma Intake
Turbo Performance Tip - Invest In A New Downpipe - EuroSport Tuning
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How much horsepower can you get out of a B48?
| BMW B48 | |
|---|---|
| Cooling system | Water-cooled |
| Output | |
| Power output | 115–225 kW (154–302 hp) |
| Torque output | 250–450 N⋅m (184–332 lb⋅ft) |
BMW B48 - Wikipedia
Wikipedia
https://en.wikipedia.org › wiki › BMW_B48
Wikipedia
https://en.wikipedia.org › wiki › BMW_B48
How much HP does a downpipe add to a BMW?
Â
This video shows the horsepower gains on a G80 M3 after installing downpipes:
RaceChip
YouTube · Aug 8, 2023
Typical Gains
- With Tune (Stage 2): 20-30 HP is common, with some setups pushing past 300 WHP.Â
- Without Tune: Expect smaller gains, around 5-10 HP for a simple swap, but better turbo response.Â
- Secondary Cat Delete: Removing just the secondary cats can yield around 15 HP on its own.Â
This video demonstrates how much power can be gained with both a downpipe and a cold air intake:
AJ Drives
YouTube · Jan 23, 2026
Key Factors
- Tuning is Crucial: Downpipes unlock the most power when paired with a tune that optimizes the increased airflow.Â
- Catless vs. Catted: Catless pipes offer max flow, while high-flow catted pipes provide significant gains with better emissions compliance.Â
- Model Dependent: Gains vary by engine (N20, S58, etc.) and drivetrain (RWD/XDrive).Â
Additional Benefits
- Faster Turbo Spool: Quicker response and less lag.
- Better Sound: Deeper tone and more turbo noise.
- Reduced Heat: Less strain on turbos.Â
AI responses may include mistakes. Learn more
BMW G80 M3 662HP Does a Downpipe Make a Difference? 100 ...
Aug 8, 2023 — now I'm in the bench. welcome back to the next episode of Raship Insights this episode is going to be a little bit long...
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How much power gain with DP? - BMW M3 and BMW M4 Forum
Feb 16, 2020 — How much power gain with DP? - BMW M3 and BMW M4 Forum. Hi, I have a custom tune on my M4 comp. which gave 505hp (driv...
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How much power from downpipes - BMW 3-Series (E90 E92) Forum
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400HP on stock downpipe? : r/F30 - Reddit
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PSR Parts
Downpipes: Everything you need to know | MAPerformance
Jan 10, 2022 — Yes. Performance catted downpipes nowadays have been shown to increase horsepower. An aftermarket downpipe with cataly...
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Can a downpipe damage an engine?
A downpipe alone usually won't mechanically destroy an engine, but removing the catalytic converter (catless) without an ECU tune can stress the turbo, create dangerous exhaust gas temperatures (EGTs), cause lean fuel conditions, and damage sensors, leading to potential engine damage, especially piston/bearing issues and turbo failure over time. While some stock ECUs might adapt slightly, a proper tune is crucial to adjust fuel/air ratios and boost for safety and performance, preventing over-boosting and potential knock.Â
This video explains why you might need a downpipe and the importance of tuning:
Zip Tie Tuning
YouTube · Jun 13, 2025
Risks of No Tune or Catless Downpipe
- High EGTs: Increased exhaust gas temperatures stress the turbocharger, valves, seals, and gaskets.Â
- Fuel/Air Issues: Can cause a dangerous lean condition (too much air, not enough fuel), leading to engine knock and damage.Â
- Turbo Stress: Faster spool-up and increased boost can overwhelm stock components without a tune.Â
- Sensor Damage: Extreme heat and fumes can harm oxygen sensors and other wiring.Â
- Check Engine Light (CEL): The ECU detects the missing catalytic converter, triggering a CEL.Â
- Melting: High heat can melt nearby plastic, wiring, or even transmission pans.Â
This video explains why some common car modifications, like catless downpipes, are not recommended for street cars:
OffCamber Autosport Shop
YouTube · Jan 29, 2026
When it's (Relatively) Safer
- High-Flow Catted Downpipes:These retain some emissions control and are less prone to causing immediate issues than catless, though tuning is still often recommended.Â
- Proper Tune:A professional ECU tune recalibrates fuel, timing, and boost, managing the increased exhaust flow safely.Â
- Supporting Mods:With a full supporting build (intake, tune, intercooler), the engine is better equipped to handle the changes.Â
In Summary
For safety and longevity, installing a downpipe (especially catless) on a turbocharged car requires a proper ECU tune to prevent stress, overheating, and potential damage, even if some drivers report running without one for a while.Â
AI responses may include mistakes. Learn more
Will high flow downpipe without tune have any adverse effects? : r/cars
Jul 6, 2022
Reddit ·Â
r/cars
Any risks of damage with a catless downpipe on a BMW M235i?
Nov 17, 2023 — Hey guys I wanted to ask if my friend that has a m235i bought a catless downpipe and only drove with that no other wou...
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Aug 7, 2024 — I only have downpipes on my 550 with no exhaust will it mess up the engine? ... No, only concern might be backfires or ...
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Feb 18, 2025 — Installing a catless downpipe can offer significant performance gains, but it also brings some risks that need to be c...
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Is a Catless Downpipe Bad for the Engine? - Artdaily
Dec 5, 2024 — Effects of a Catless Downpipe on the Engine Using a catless downpipe can cause serious issues if you don't tune your en...
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I don't get the hate for the B48 engine : r/F30
Reddit · r/F30
110+ comments · 1 year ago
Reddit · r/F30
110+ comments · 1 year ago
The discussion thread titled "I don’t get the hate for the B48 engine" explores why some people dislike this BMW 4-cylinder engine, even though many find it sufficient for daily driving. Commenters feel the B48 offers good performance, fuel efficiency, and responds well to modifications. Some suggest the "hate" comes from a desire for more power or the prestige of a 6-cylinder B58 engine. Others point out that for many drivers, especially with tuned versions, the B48 provides plenty of power for the road. Price differences in some regions make the B48 a sensible choice. A key consideration is that the B48 can be a fun and capable engine, and the focus should be on individual driving needs rather than just horsepower.
AI summaries may include mistakes. Learn more.
MoreLessSummaryHow to Install a B48 Downpipe: Step-by-Step Guide - CarInterior
Alibaba.com
https://carinterior.alibaba.com › question › b48-downpip...
Alibaba.com
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Feb 10, 2026 — A proper B48 downpipe installation can yield 20–30 wheel horsepower gains when paired with an ECU tune, improve throttle response, and enhance ...Read more
N20 Catless Downpipe for BMW F30 328i/330i 2.0L 2012- ...
Flashark
https://flasharkracing.com › products › downpipe-exhaus...
Flashark
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Save 21% on Flashark Catless Downpipe for 2012-2014 BMW F30 328i/330i N20. Increase power, torque, and efficiency with this T-304 stainless steel upgrade.
$125.88In stockFree delivery30-day returns
Wholesale Exhaust Downpipe for B48 F32 F33 F36 420i ...
AliExpress
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AliExpress
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Specifications *Crafted by hand from tig welded, 304 grade stainless steel. *Smooth radius bends to decrease turbulence and increase flow.Read more
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