Mercedes A45 S 3” Decat Downpipe CLA45 S A45S AMG with Heat Shield 2019- | MTC Motorsport


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MTC Motorsport Mercedes A45 S AMG Stainless Steel Decat Downpipe Exhaust with Heat Shield

The A45 S downpipe is machined from T-304 high-grade stainless steel and are tig welded in house
The downpipe is 3” off the turbo and all the way down to the machined flange that joins to the mid pipe. This provides a sharper throttle response due to faster spool of the turbo
This downpipe will provide noticeable power gains and a much more aggressive exhaust note which sounds truly amazing
It produces lower temperatures and less exhaust backpressure due to the relief of the turbocharger. The cylinder charge is increased which contributes to maximum performance.
There is also a substantial weight saving in comparison to the factory catalytic converter.
The decat is mandrel-bent for better gas flow and maximum internal size to ensure ultimate performance without the loss of mid-range torque. 
Finished in brushed stainless

The OPF/GPF can be connected and coded out or just taken off the car and coded out completely. Please speak with a tuner before purchasing this item to make them aware of what they have to do.

The standard V band clamp onto the turbo and downpipe to mid pipe clamps work perfectly.
This will fit the following models with OPF/GPF:

A45 S AMG 2019-
CLA45 S AMG 2019-
GLA45 S AMG 2019-

We have tested this product and found increases of around 18-20bhp.
Professional installation is recommended as some exhausts sit slightly different from others and can be tight.
We also recommend purchasing a Lambda Sensor Spacer(s) to prevent the engine light coming on in most cases. If you search our other items you will find these. 

This product comes with a lifetime warranty.

Shipping Continents: Europe

Shipping Countries: United Kingdom (UK)


Shipping Policy

MTC Motorsport ships Monday-Friday excluding holidays. The shipping cut-off time is 13:30pm (GMT). Orders placed after 13:30pm will be processed the next business day. All orders will be shipped express, usually arriving within 24 hours (UK only).

For orders outside of the UK, an surcharge will occur.

Where do you ship to?

How long will my order take?
Once your order has been dispatched, you’ll receive an email with tracking information.

UK: next day


Refund Policy

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. You’ll also need the receipt or proof of purchase.

To start your return or for any returns queries, please contact us at [email protected].

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Please note, to offset the cost of order processing, the customer will be charged a restocking fee by MTC Motorsport on all returned goods unless we accept liability for any unsuitable or faulty item. An amount of 10% of the purchase price plus the original postage will be applied.

Weight 2 kg
Product Brand

MTC Motorsport

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