Exhaust› Catalytic Converters

CTS Turbo

3.5" High Flow Cat for BMW N55

$322.99

SKU: CTS-EXH-DP-0022

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Special Order
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The CTS Turbo 3.5" High Flow Cat is a catalytic converter designed for the BMW N55 engine with a pneumatic wastegate. It replaces the factory downpipe to optimize exhaust flow and unlock greater power. Constructed from T304 stainless steel with TIG welding, it offers a sporty exhaust note without excessive drone.
Show original supplier description
The CTS Turbo 3.5" High Flow Cat is an aftermarket catalytic converter engineered specifically for BMW N55 engines featuring a pneumatic wastegate. Precision-designed and tested in real-world conditions, it aims to optimize performance without negatively impacting sound quality, providing a sporty exhaust note with subdued sound and minimal drone during cruising. Constructed from durable T304 stainless steel, the downpipe is built for reliability with hand TIG welding and back purging. It is recommended for off-road use only and requires proper tuning software, such as Bootmod3, for Check Engine Light (CEL) removal. It is important to note that catalytic converters damaged by 'crackle tunes' are not covered under warranty. This product is not for sale or use in the state of California on any pollution-controlled vehicle, as per the California Air Resources Board regulations. It is specifically designed for the BMW F30 335i and 335i xDrive models with the N55 3.0L engine (Pneumatic Wastegate).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCTS Turbo
Part NumberCTS-EXH-DP-0022
CategoryExhaust
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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