BMW M5 | M8 (F90/F91/F92/F93) Primary and Secondary Downpipes, Intakes, Filters, and Tuning Package (Bootmod 3 or MHD) | FEMTO Package

Unlock the full performance potential of your BMW M5 or M8 (F90/F91/F92/F93) with Project Gamma’s complete downpipe, intake, and ECU tuning package. Designed for serious performance gains, our high-flow downpipes are paired with premium silicone intake systems and your choice of Bootmod3 or MHD ECU tuning — giving you the flexibility to tune your vehicle on the platform you prefer for maximum results.

This all-in-one performance bundle is engineered to improve exhaust flow, increase airflow, and unleash significant horsepower and torque gains — all while adding aggressive induction sound and a clean engine-bay aesthetic. 

Package Highlights

🔥 Project Gamma High-Flow Downpipes

Project Gamma downpipes for the M5 and M8 models feature a high-flow 3” construction with precision CNC-machined stainless steel v-band transitions for optimal exhaust flow. Unlike competitors that constrict near the turbos, our downpipes maintain a full 3D diameter throughout for maximum flow and performance gains when tuned.

• Handcrafted from 304 stainless steel

• Designed for tuning and performance builds

• Gains up to ~50+ HP and ~60+ lb-ft torque with proper calibration

• Improved turbo response, reduced lag, and enhanced sound

🌀 Project Gamma Silicone Intake System & Filters

Our intake system is engineered using 4-layer reinforced silicone with an oil-resistant inner lining and precision aluminum connectors that ensure improved airflow and durability. The larger internal diameter and smooth airflow path deliver:

• Increased horsepower and response

• Faster turbo spool

• Enhanced throttle feel and acceleration

• Aggressive induction sound and OEM-plus fitment

The reinforced silicone construction also prevents collapsing under high boost pressures and high-flow filter setups.

Note: Please select your preferred intake color and filter color at checkout.

⚙️ ECU Tuning Options (Choose at Checkout)

Take full advantage of your new hardware by selecting one of the supported ECU tuning platforms:
✔ Bootmod3
✔ MHD

Both platforms allow for professional calibrations that unlock performance while ensuring smooth power delivery and reliability. You will need an ENET cable and a compatible device to flash your vehicle — email us with any questions regarding cable compatibility.

🔧 Stage 2 Recommendation:
2-step colder spark plugs gapped to 0.22 are recommended for Stage 2 applications.

🛠 Fitment & Installation

• Designed specifically for BMW M5 & M8 (F90/F91/F92/F93) platforms

• Plug-and-play install with no cutting or permanent modifications

• Professional or experienced DIY installation recommended

• Includes all required hardware for fitment

🔥 Ceramic Coating Option

The product images may show ceramic-coated downpipes. For added engine bay protection and reduced heat soak, please select the Ceramic Coating add-on before checkout — otherwise, the downpipes will ship with a polished finish.

If your item is in stock and the order is placed before 3 PM, it will ship the same day. Products that include ceramic coating are shipped the following business day. If the product or color you’re looking for is out of stock, you can join the waitlist by clicking the “Email When Available” button. We’ll notify you as soon as it’s back and provide an estimated restock time.

Custom Orders
For custom requests, please email us directly. We’ll review your order and provide an estimated delivery time based on the required manufacturing process.

Damaged, Incorrect, or Missing Items
If your order arrives damaged, incorrect, or missing parts, simply email us a photo along with your order number. We’ll arrange a refund or exchange right away. Contact us at info@ttmengineering.se and we’ll make it right.

Returns & Satisfaction
Unused and uninstalled products are eligible for a refund, exchange, or store credit. Unfortunately, once a product has been used or installed, we cannot accept returns or offer refunds. If you decide you don’t like a product after installation, it will not qualify for return.

Restocking Fee
A restocking fee of 20% of the original purchase price may apply to returned products. This fee covers the costs of processing and restocking. Please refer to our Policies Page for full details on exchanges and returns.