The B48 B46 Horsepower Package unleashes the true potential of your 2.0L turbo engine—delivering 320-380 horsepower based on your BMW models and fuel quality. This comprehensive performance upgrade transforms your vehicle into a high-powered machine while maintaining reliability within its limits.
Purchase everything together with extra 5% discount and save up to $216.
Experience a significant boost in horsepower, faster turbo spool times, a sharper throttle response, and an exhilarating turbo induction & exhaust note.
Note: We have two versions of Downpipes, You will receive one as per your selection.
If you want to change/customize this HP package by yourself or for different vehicle, please consult with our specialized team — they will provide expert guidance to help you achieve the best results.
To achieve maximum horsepower and match these performance figures, you’ll need to run an E30 blend or 100-octane fuel. This higher-octane setup may also require a fuel system upgrade to ensure proper flow and reliability.
Fitment (BMW 2, 3, 4 Series)
2022–2024 G42 230i – B48/B46 2.0L I4 | Stock: 181–255 HP | HP Package: 320–380 HP
2019–2024 G20 320i / 330i – B48/B46 2.0L I4 | Stock: 181–255 HP | HP Package: 320–380 HP
2021–2024 G22 G23 G26 420i, 430i– B48/B46 2.0L I4 | Stock: 184–255 HP | HP Package: 320–380 HP
2016–2021 F22 / F23 230i – B48/B46 2.0L I4 | Stock: 248 HP | HP Package: 320–380 HP
2016–2019 F30 / F31 / F34 320i / 330i – B48/B46 2.0L I4 | Stock: 180–248 HP | HP Package: 320–380 HP
2016–2020 F32 / F33 / F36 420i / 430i – B48/B46 2.0L I4 | Stock: 181–248 HP | HP Package: 320–380 HP
B48 Catless & Catted Downpipe
Performance Boost:Thanks to better smooth radius bends that reduce turbulence and increase air flow.
High-Quality Construction:Hand-crafted from TIG-welded 304-grade stainless steel for superior strength and longevity.
Our Catted Version includes 200 Cel Cat flow.
Warm and Deep Exhaust Note:Enjoy a richer, more warm aggresive sound.
Next-Level Engineering– Higher flow rate with superior performance gain.
Version V delivers a more aggressive exhaust note, while Version IV offers a warm and rich sound
B48 Intake
Power Gains:Dyno-proven increases in horsepower and torque for thrilling acceleration.
Improved Throttle Response:Quicker, sharper reaction under any driving condition.
Aggressive Turbo Sound:Deep, sporty induction tone that turns every drive into an experience.
Heat Shield Protection:Keeps intake air cooler for consistent, reliable performance.
Direct OEM Fitment:Simple, bolt-on installation—no modifications needed.
Premium Aluminum Intake Pipe:Built for durability, performance, and a deep, sporty induction sound.
High-Flow Design– Black powder coated aluminum intake pipe paired with a high-performance air filter ensures maximum airflow.
CNC Machined & Anodized Black Finish– Precision engineering with a clean, OEM-plus look.
Turbo Inlet Pipe: Included in the system is a turbo inlet pipe that improves airflow and supports the overall performance of the intake system, helping the engine achieve maximum gains..
Design:Precision-engineered mounting hardware ensures a solid, rattle-free fit even under intense engine load.
B48 JB4 Tune
Tuner will come with JB4PRO Adapter (Uses Free JB4PRO App for iOS and Android)
Improves 0-60 times and 1/4 mile time
Preloaded with custom JB4 BMW tuning software and up to 8 maps for various fuel and modification levels
Ethanol (E85) compatible tuning maps
Able to read/delete fault codes
View and record up to 40 different gauges/engine parameters in real time with the JB4 app.
Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
Exhaust flap operation can be controlled in most JB4 applications
Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
The JB4 offers a lot more performance, functionality, and safety than your average performance chip
Quick Plug & Play Installation
CANbus OBDII integration offering unrivaled tuning features and performance
Improved performance over non-integrated chip tunes
Runs as smoothly as stock, this is how your vehicle should have come from the factory
Compatible with all driving modes
Fuel economy unchanged during normal driving
91 octane fuel or better required for performance gains
Not VIN locked and can be removed without a trace and resold down the road
Includes the rugged JB4 billet aluminum enclosure for protection
All products are shipped out from one of the Signature Autohaus shipping locations. Signature Autohaus drop ships some products and ships direct others. All products are shipped via FedEx, UPS, DHL or another qualified shipping carrier.
Special arrangements may need to be made for international orders and oversize packages.
In the event a product arrives damaged to your location, please follow the steps listed below. All damaged items must be reported to the shipping carrier immediately and you must notify Signature Autohaus within 5 days of receiving your order. If these steps are not followed, your shipment may not be able to be a candidate for a claim.
Complete the Shipping DAMAGE Claim Form by contacting the carrier that delivered your package.
1) Keep the product and its original packaging and box
Make a list of the damaged or lost item(s)
2) Signature Autohaus will contact the shipper once we receive the email info above to schedule a pickup, DO NOT send it back to us
3) Once the product is picked up and inspected by Signature Autohaus and or Supplier, a replacement or credit will be issued.
4) The Shipping Rates shown at time of checkout our dimensional rate only. If your shipment weight is to much then contact us for a shipping quote. If there is an error in the shipping rate quoted we will contact you and let you know of the changes. International orders(Outside the USA) are not automatically processed as we may require additional information from you.
If a product is ordered and not wanted, the UNUSED item can be returned for a 35% restocking fee. Shipping is not refundable in either direction. All items wanting to be return MUST be reported within 30 days of the original invoice date. No items will be returnable after 30 days. All products shipped from the Signature Autohaus warehouse are shipped via FedEx or Freight and require a signature when delivered. Some packages shipped from the manufacturer may or may not require signatures for package release. Fedex, UPS, and DHL have package pick up locations if you are unable to sign for the package. If the package is returned to Signature Autohaus or manufacturer, you will be responsible for the return shipping costs and pay a 35% restocking fee. These fees will be charged to your account on file.
SIGNATURE AUTOHAUS DOES NOT REFUND SHIPPING CHARGES. If you modify, install, or alter the item in any form, we cannot accept it as a return, will not cover any expenses related to the product or installation, and you maybe be required to purchase a replacement.
In the event that the product you ordered is sent either incorrectly or processed wrong by Signature Autohaus, we will arrange for the package to come back to us and ship out a replacement. We will evaluate the situation before we determine the shipment was incorrect.
To return a item back to us, please do the following:
1. Contact our Customer Service Department to receive a RMA number. All packages returned without a Returned Merchandise Authorization number will be refused.
2. Package the item up in original packaging unless deemed unuseable
3. Include the UNUSED parts and any additional information that was included
4. Include a copy of your receipt
5. Write a brief description of the problem with the product
6. If you have a receipt for the return shipping include as well
7. We DO NOT accept any freight collect packages
8. Once we have received the above information we will notify you via email or phone and let you know the status.
We use cookies to improve your experience on our website. Read about how we use cookies in our Privacy Policy. By browsing this website, you agree to our use of cookies.
privacy policy
Ask The Signature Experts anything. We can help and advise you from mild to wild! Complete this form and we will follow up with you typically within 24 hours.
