Registered. No question a catless DP would help even as much as approaching 80 HP with a custom tune.
Table of Contents
How much HP does a downpipe add to a 335i?
Expect gains of approximately 50HP when upgrading the downpipes and flicking the switch to Stage 2 tuning. The difference in power gains from a catless downpipe compared to a high flow catted downpipe are only a few horsepower.
How much HP does a Catless downpipe add N55?
Summary on N55 Downpipes Catless downpipes are the least restrictive and offer the most performance benefit, at approx. 25whp for tuned vehicles.
How much HP does a Catless downpipe add N54?
N54 Catless Downpipes Performance Benefits +15-25 Horsepower and Torque. Incredible turbo spool. Intoxicating Sound.
Do I need a tune to run Catless?
You don’t need a tune, Ktuner/Hondata is just so you can disable the Check Engine Light that comes from having no cat. You can use a defouler though but sometimes you will still see a check engine light when your car is idling for longer periods of time.
Are BMW downpipes worth it?
For power, if you don’t plan on tuning then don’t waste your time with a downpipe. You’re not going to notice much aside from throttle response and a deeper note/louder burbles. If you were going to tune then I would say a downpipe is 100% worth it. CEL can be fixed by a spacer, it does work.
How much HP is a Stage 2 335i?
Low-Pressure Fuel Pump (LPFP) – Stage 2 (500hp) or Stage 3 (550+hp)
Will a Catless downpipe throw a code?
Yes. Yes, installing a catless DP will throw a code, and you need a tune to have the code auto-erased.
How much HP does a Stage 1 tune add 335i?
On the Stage 1 map, that increased to 345 ft lbs of torque, and 284 hp, which is a lot for just a re-flash of the ECU. It is worth mentioning that those results were on the Cobb 93 octane map, but we were running 91 octane in the car because that is the highest octane rating that we have access to here in Colorado.
How much HP can a N55 335i handle?
The N55 can handle around 550whp and 550wtq on the stock engine block and internals.
Is Catless louder than Catted?
How much louder are catless headers from catted? Both are significantly louder. The high flow cats available for most headers don’t go a lot for volume, but control rasp some. If you don’t want to have a warranty issue, don’t do significant power mods.
How much HP does a Stage 2 N54 make?
Expected horsepower for the N54 on stage 2 maps is in the ballpark of 330-390whp.
Do Catless downpipes change sound?
Downpipes (catless) will make the exhaust sound more aggressive and deep.
Are Catless downpipes legal?
Are catless downpipes legal on the street? No. For example, Riss Racing lists their catless DP’s for “off-road use only” because of this.
Does Catless downpipe increase sound?
Catless downpipes are always louder because they provide more space and lesser exhaust pressure for sound waves to travel.
Will a Catless downpipe hurt my engine?
No it will not damage your engine. However, it will throw a code telling you that your cat converter is not doing its job.
Will a Catless car smoke?
It’s pretty normal for many performance cars to smoke somewhat when catless though. Any hydrocarbon byproducts are normally catalyzed, so without them they just burn and blow through.
What happens when you go Catless?
Going catless has the benefits of eliminating restrictions in your exhaust + reduces back pressure on the engine to allow for more airflow, thus more power. Eliminating the cats will also have the added benefits of reducing weight, and therefore incremental performance gains.
Do downpipes add HP?
Upgraded downpipes provide great increases in horsepower and torque on turbocharged vehicles by allowing exhaust gasses to flow easier as they leave the turbo. Paired with the appropriate software, a downpipe can provide significant gains and make a vehicle more fun and engaging to drive.
How much HP does a downpipe add BMW?
Upgraded Downpipe + Intake + Tune = Best Performance Benefit With zero other mods, a B58 with an upgraded downpipe will add approx. 10-15whp. This is simply from better turbo spool and more efficient turbo performance. However, the gains become amplified on cars that have other mods.
How much HP gain from downpipes?
Downpipe For Horsepower: Worth It? If you are installing a downpipe for the horsepower gain, then it’s definitely worth it. Combined with a tune, you could see a major boost in horsepower – about 40 to 50 horsepower gains. After installing a downpipe, the exhaust flow in your car will be improved considerably.
Is Stage 1 or 2 better?
Stage 2 tune provides higher power gains than stage 1 but is more complex since you will have to remap the engine, get additional components, and perform expert-level modifications on the parts. Getting a larger turbo or a hybrid turbo in your vehicle is an example of a stage 2 tune.
How much HP can stock N54 handle?
The N54 can handle around 600-650whp and 550-600wtq on the stock block and internals.
What is the fastest 335i?
- Motiv Motorsports – 978WHP + 776TQ – E90 335i.
- The Kraken – 920WHP & 865TQ – 2007 335i.
- The Panda – 890WHP + 793TQ – 2008 BMW 335i.
- 939WHP + 862TQ – 2007 BMW 335i Sedan.
What is the smell with a Catless downpipe?
Its not so noticeable if you’re driving outside, but if the car is stationary with engine on and you have tailwind, you will feel it also. Guys selling catless downpipes will tell you that it smells like flowers, racetrack etc, but I suggest borrow catless n20 car and decide yourself after 2-3 days of usage.