Exhaust› Exhaust Pipes, Systems and Components

RENNtech

M133 Performance Downpipe

$2,440.00

SKU: 49.133.0345

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The RENNtech Downpipe M133 is an exhaust downpipe designed for 45 AMG engines. It fits the 176 - A 45 AMG, 117 - CLA 45 AMG, and 156 - GLA 45 AMG models.

This performance downpipe is crafted from T-304 stainless steel with a 3.5" inlet and a 3" outlet. It features a 200-cell high-flow, tri-metal catalytic converter and is finished with a thermal-resistant coating.
Show original supplier description
The RENNtech Downpipe M133 is a performance exhaust component engineered to maximize exhaust gas flow and minimize back pressure for M133-equipped 45 AMG engines. It serves as a complete bolt-on power solution. Constructed from durable T-304 stainless steel, this downpipe features a 3.5-inch inlet and a 3-inch outlet, designed to seamlessly mate with the OEM exhaust system. It includes a specially coated, high-flow, tri-metal 200-cell catalytic converter that is significantly freer flowing than restrictive OEM units while efficiently filtering exhaust gases. This downpipe is specifically designed for the Mercedes-Benz 176 - A 45 AMG, 117 - CLA 45 AMG, and 156 - GLA 45 AMG. It requires no ECU modifications or re-programming, and its design ensures the check engine light remains off. The unit is finished in a thermal-resistant coating and requires no modifications to the OEM system.

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

BrandRENNtech
Part Number49.133.0345
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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