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AMS Performance Open Airbox Intake Kit for G8x BMW M2 / M3 / M4

AMS Performance Open Airbox Intake Kit for G8x BMW M2 / M3 / M4

AMS Performance Open Airbox Intake Kit for G8x BMW M2 / M3 / M4 [AMS.48.08.0001-1]

$999.95

IN STOCK, READY TO SHIP

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The AMS Performance Open Airbox Intake Kit for the G8x M2, M3, and M4 maximizes power and response with a high-flow, open design that boosts airflow, sharpens induction sound, and delivers dyno-proven gains of up to +86whp, all wrapped in lightweight carbon fiber engineering.

STOCK STATUS: 4 in stock

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SKU: AMS.48.08.0001-1 Categories: Intakes & Fuel, Intake Kits Vehicle: BMW, BMW 2 Series, BMW 3 Series, BMW 4 Series, BMW M2, BMW M3, BMW M4, Brand: AMS Performance

This item and any similar items are not CARB approved and therefore not for sale in the state of California or other states that require CARB certification. No assessment is being made regarding this product's compliance with the EPA's anti tampering policy, only that the necessary testing and validation has not been completed. Please check with your local enforcement officials regarding legality of use in your place of residence.

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Description

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Description

AMS Performance Open Airbox Intake Kit for G8x BMW M2 / M3 / M4

AMS Performance developed the BMW G8x M2 / M3 / M4 S58 Open Airbox Intake Kit to deliver maximum performance, response, and turbo efficiency with a motorsport-inspired design. At the heart of the system is a massive 3.5” carbon fiber intake tube and precision-molded 4-ply silicone couplers, feeding into turbo inlet elbows that are up to 128% larger than stock for dramatically improved flow. This open-airbox configuration exposes the high-flow dry filter elements to more ambient airflow, resulting in a more aggressive induction note and increased thermal efficiency. Dyno-proven gains include +86whp at peak and an average of +66whp above 5000rpm, extending power across the rev range. With a focus on function and aesthetics, AMS delivers a lightweight, track-capable solution that installs with ease and elevates both the visual and audible presence of the G8x platform.

The Power of Focused Engineering

AMS Performance approached the development of the BMW G8x M2 / M3 / M4 S58 Air Intake System with an uncompromising engineering-first philosophy, led by its in-house Snailworks Engineering Team. Leveraging advanced computational modeling, flow-bench testing, and dyno validation, the team engineered an intake solution that significantly reduces pressure drop and flow restriction throughout the entire system. Featuring a 128% increase in cross-sectional area over the OEM intake piping, the design enables the S58’s twin turbos to operate with greater efficiency, resulting in improved compressor performance and consistent power delivery across the full RPM range.
To offer both performance and aesthetic versatility, AMS Performance designed two configuration options — a carbon fiber lid version with magnetic fasteners for easy filter access, and an open-top configuration that includes a precision trim plate and premium stainless hardware. Each variant was crafted for precision fitment and durability, whether the user prioritizes a refined, enclosed appearance or the aggressive intake tone and airflow benefits of an open system. This dual-approach design ensures every enthusiast can tailor their setup without sacrificing AMS’s proven performance gains.

Slow Is Smooth – Smooth Is Fast

The intake tract geometry and silicone couplers were meticulously optimized to promote laminar, high-velocity flow into the turbos. Each segment of the intake maintains a smooth and consistent cross-sectional area to minimize turbulence and preserve airspeed. Additionally, the filters themselves are built with radiused edges to reduce entry losses, further enhancing volumetric airflow. This cohesive airflow strategy improves turbocharger response, reduces effort required to spool, and translates directly into a more responsive, powerful driving experience.

Mo’ Powa Baby

Validation of the design extended beyond lab testing. AMS collaborated with professional ECU calibrator Sam Barros, who tested the system on his fully built 2023 BMW M3 Competition xDrive running flex-fuel, upgraded injectors, a mid-pipe, AMS heat exchanger, and catted downpipes. After initial dyno sessions with the factory airbox at peak tuned output, the AMS S58 Intakes were installed and the setup recalibrated to utilize the improved airflow. The result – repeatable, real-world gains that translated into measurable power increases across the rev range.
Barros’ testing revealed a peak gain of +86whp at 5900rpm, with an average increase of +66whp above 5000rpm, along with improved torque and stronger throttle response across the powerband. These results confirm that the AMS system not only excels on the dyno but provides meaningful benefits in real-world driving scenarios — whether on the street or track.

Results That Speak For Themselves

In pursuit of absolute airflow precision, AMS conducted a flow-bench comparison using MoTeC instrumentation and MAF-based airflow data. Testing the OEM setup, two top competitors, and the AMS intake under identical simulated 600whp conditions, the factory system recorded -2.15 psi of pressure drop on the right intake tract — evidence of severe restriction. While competitor systems fared marginally better, they still showed significant pressure loss. The AMS intake outperformed all tested systems, showing only -1.05 psi of depression and flowing more air at every point. Moreover, it delivered nearly identical results across both intake banks — evidence of a balanced, precisely tuned design that supports smoother calibration and engine operation.

Track Tested. Race Proven.

Track validation further reinforced the system’s real-world capabilities. Professional driver Jackie Ding installed the AMS G8x Intake on his M2 race car, and dyno testing confirmed improved airflow and top-end power retention, particularly at high RPM where the OEM system typically falters. On track, the results were even more compelling: Ding reported higher top speeds, longer gear holds, and greater acceleration consistency — all of which contributed to measurable improvements in lap times. The AMS Performance Intake proved itself not just as a dyno performer, but as a true competitive advantage where it matters most — on the racetrack.

Features

Open airbox style
+86whp max gains over stock intakes during testing
3.5″ carbon intake tube for increased airflow over OEM
Up to 128% larger cross section at turbo inlet elbows compared to OEM
Broad powerband with an average of +66whp gained above 5000rpm
Massive cast turbo inlet elbows allow unimpeded airflow directly to the compressor wheels
Up to a 48% reduction in intake restriction compared to stock
Dry filter media for reliability and easy cleaning
4-ply hump hose silicone is designed for smooth air delivery into the turbos
Easy install with industry leading instructions provided

Applications

BMW M2: G87 (2023-present)
[S58 – 3.0L I6 twin-turbo]
BMW M3: G80, G81 (2021-present)
[S58 – 3.0L I6 twin-turbo]
BMW M4: G82, G83 (2021-present)
[S58 – 3.0L I6 twin-turbo]

Notes

As these motorsports grade carbon fiber parts are hand laid, slight imperfections or weave pattern variances can be expected
Performance numbers can vary

About AMS Performance

AMS Performance is founded on principles of integrity and is dedicated to automotive performance, particularly for turbocharged vehicles. As a leading manufacturer of automotive performance parts, AMS not only offers a wide range of high-quality components but also provides additional services such as in-house engine computer calibration, parts and package installations, and engine and transmission building. At AMS, their primary focus lies in engineering. Unlike other shops, they prioritize the development of components that deliver unparalleled performance. Their approach goes beyond a basic understanding of engine performance, utilizing computer-aided designs and employing mechanical engineers with extensive experience in the motorsports field. With a history spanning two decades, AMS Performance has consistently maintained its position at the forefront of the industry. Whether you seek complete turn-key packages or individual components, AMS has the expertise to meet and surpass various performance goals. From drag racing to road racing and everything in between, AMS is ready to enhance your driving experience and elevate your vehicle’s performance to new heights.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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