Do you want to feel the power of the Toyota GR Supra or BMW B58 engine? (M340i, 540i, or Z4 models). Those who feel smooth, turbocharged power in their rides know what we are talking about. And if you are looking to enhance performance and sound even more, putting a downpipe in will unlock a range of benefits.
If you are wondering which is the best downpipe to complement your ride, we know the choice can sometimes be overwhelming. When upgrading your performance vehicle, choosing the best BMW B58 downpipes can significantly boost turbo response and horsepower. Especially if you are after a deeper growl from the exhaust, better turbo response, or an increase in horsepower. Don’t worry; every problematic situation has a solution.
Understanding Downpipes
Let’s recap a bit before diving into the specifics. So what is a downpipe, exactly?
In detail, the downpipe refers to the segment of the exhaust system that links the turbocharger to the rest of the exhaust system. It is where exhaust gases from the turbo need to go. If you have a lower flowing downpipe, that means less movement of exhaust.
These types of downpipes result in a lower output of power. The opposite is true for an upgrade on the downpipe. A faster-moving exhaust gas means more power.
Catted vs. Catless: What is The Difference?
The Catted Downpipes or Catted DPs incorporate a high-flow catalytic converter, which reduces the noise level and emissions. On the contrary, Catless Downpipes do not have a catalytic converter, improving the sound and performance while emitting the highest amount of emissions.
Catted vs Catless: A Comparison Table
Here is a quick breakdown that will help you make the decision:
| Feature | Catted Downpipe | Catless Downpipe |
| Power Gains | Moderate | Maximum |
| Emission Legal | Often (Check local law) | No |
| Exhaust Smell | Minimal | Strong |
| Exhaust Sound | Sporty but controlled | Loud and aggressive |
| Daily Driving | Great for daily use | Better for track use |
Factors to Consider While Buying a Downpipe for BMW B58
These are the tips you should keep in mind when looking for a downpipe:
- Material: 304 stainless steel is the industry standard due to its strength and resilience against corrosion.
- Fitment: Make sure it was engineered to fit your specific B58 or A90 model, since Supra’s downpipes are often incompatible, but it’s worth it to double-check.
- Build Quality: The thick flanges and clean welds ensure proper construction. An ill-fitted lower downpipe could cause issues with exhaust gas leaks or more severe damage.
- Heat Management: Protecting other components and reducing under-hood temperatures can be achieved through the use of heat wrap or ceramic coating.
- Warranty & Brand Reputation: Look for a trusted brand or one that provides fast testimonials. Adding a d-list brand will cheapen your build.
Top Brands To Consider If You’re Competing In The B58/Supra Platform
These are some more reputable brands to consider:
- Palenon Performance: One of the most popular and trusted brands for downpipes and other aftermarket parts. They are well known for their top-notch quality at a reasonable price range.
- VRSF: Ensured fitment and the best customer support make them a leader among budget-friendly sellers.
- ARM Motorsports: Budget options without sacrificing weld quality.
- CTS Turbo: Reliable fittings, striking design, and solid performance define these parts.
- Evolution Racewerks: Premium option with race-proven results.
- Other Notable Mentions: HKS, Agency Power, and Burger Motorsports, which provide solid alternatives.
All of these brands provide catted and catless options that you can choose from depending on your needs, preferences, and financial constraints.
Common Mistakes and Installation Tips
For seasoned do-it-yourselfers, installing a downpipe is not much of a challenge. However, it’s not a set-it-and-forget-it task. Users can expect a time range of 2 to 4 hours, depending on the available tools, expertise, and prior industry knowledge.
Some Useful Tips
- Spray bolts with WD-40 the night before
- Use a torque wrench; it is ideal for applying tension
- Ensure gaskets and clamps are checked at least twice
Common Mistakes to Avoid
- Failing to reset the ECU clear codes
- Leaving the V-band clamps loose
- Ignoring the important heat protection
If these things sound like too much work, let us go ahead and suggest that you have a shop somewhere tackle the task. That way, you avoid bloodied knuckles and multiple headaches.
Conclusion
So, the question is, “What is the best downpipe for your B58 or Supra?” It actually depends on what you are looking for:
- Are you a moderate gain driver? Then catted is the way to go.
- Catless is for those with track builds or cab volume enthusiasts.
- For dependable downpipes, VRSF, Palenon Performance, or CTS are reliable options.
No matter what brand you decide to go for, upgrading the downpipe of your turbo B58 or Supra is one of the most noticeable and rewarding adjustments. Just remember to set a proper tune, back it up with other modifications, and savor the enhanced performance.
