Your standard exhaust will have restrictions within the exhaust boxes, known as baffles & chambers. One of the aims of this type of exhaust box is to reduce the sound level with intersections & sound absorption material.
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Performance Brushed Catback Exhaust System for Lexus IS200T 2.0T Dual Valved Muffler Electronic Vacuum Valve Customizable Remote
Aliexpress UK
Jetex Performance Exhausts, Since 1986. A fitting kit is provided with every Jetex system. (see pictures). Sound reduction is a critical design concern with any exhaust system. Jetex silencers have no baffles.
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For BMW BMW M3 M4 G80 G82 2021-2024 3.0T Exhaust Valve Control High Performance Stainless Steel Catback Exhaust Exhaust System
Aliexpress UK
This high quality, brushed finish cat back exhaust for the Mazda RX8 is ideal as a great value for money, 100% stainless steel, direct fit exhaust for the RX8.
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For AUDI S3 2014-2018 2.0T Exhaust Valve Control Performance Stainless Steel Catback Exhaust Exhaust System
Aliexpress UK
This exhaust is Top Gear's award winning F1 style performance exhaust for the Audi R8 V8, for models 2006-2012 (pre-facelift, although we offer the same exhaust in other listings for post-facelift). Made in the UK by R8 experienced fabricators this exhaust boasts a sporty sound that is louder than OEM and gives proven performance benefits, this direct fit, lifetime guaranteed exhaust is a fan favourite and is the most popular exhaust featured on the R8Talk forum. The exhaust has been given a euro style brushed finish and features a special X-Pipe design for better gas-flow and for performance. The sound of this exhaust is a fantastic, high pitched F1 style and the system includes valves for quiet lower speed acoustics with fantastic race sound at higher revs.
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For BMW BMW M3 M4 G80 G82 2021-2024 3.0T Exhaust Valve Control High Performance Stainless Steel Catback Exhaust Exhaust System
Aliexpress UK
ModelX1 (F48). The install is complete- featuring the front, centre, and rear sections, with sleek carbon fibre finish tailpipes. The exhaust includes all relevant fittings required to install it. Gaskets/Fitting Kit- Full fitting kit included.
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CEES performance valvetronic exhaust catback system for BMW G20 M340i 3.0T 2019-2025 304Stainless Steel Exhaust pipes muffler
Aliexpress UK
Boasting one high-performance silencer and using our Valvetronic exhaust technology to enable two different levels of sound in addition to the remote. The exhaust sound is a good deal more sporty and noisy than the original, rather mild OEM system is.
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High Performance Custom Tuned Exhaust Cat Back for Audi TT MK1 1.8T 1998-2006 quality stainless steel auto Exhaust parts
Aliexpress UK
Jetex Performance Exhausts, Since 1986. A fitting kit is provided with every Jetex system. (see pictures). Sound reduction is a critical design concern with any exhaust system. Jetex silencers have no baffles.
eBay
Cat-Back Performance Exhaust System for 2009-2017 Audi S5 3.0T Heat Shield Valved Muffler Electric Vacuum Valve Remote Control
Aliexpress UK
Jetex Performance Exhausts, Since 1986. A fitting kit is provided with every Jetex system. (see pictures). Sound reduction is a critical design concern with any exhaust system. Jetex silencers have no baffles.
eBay
WRAX Titanium Exhaust with Deep Sound For BMW M3 M4 F80 F82 Catback High Performance Exhaust System Tail Performance Muffler
Aliexpress UK