Thinking of how to modify your car? A good place to start would be the exhaust. Swapping out older pipes for something wider, lighter and stronger can bring about the performance and efficiency gains that set the foundations for further modifications down the road. This can inject new life into your unsuspecting daily runabout, or improve lap times in something you’d throw around a track.
Aftermarket exhausts aren’t necessarily a new concept, with automotive makers dipping their smarts into fluid dynamics, materials science and power delivery first into track cars and then loaning that hard-earned knowledge and experience into more affordable options for street vehicles. First to go was the use of mild steel, and then design limitations that encroached on optimal gas flow. Tubing in wider stainless steel and innovative design solutions didn’t falter against the trend of continual engine downsizing and crippling emissions standards. Drivers got the added power they were after, a sexier exhaust note, and at the same time made regulators happy with reduced consumption figures.
Why Go For An Aftermarket Exhaust?
Stock exhausts endure severe cost-cutting both in terms of materials and designs. The result is a system that robs you of the full potential of the engine. Crush-bent mild steel in narrow gauges restricts airflow and has dubious strength. There’s the tendency for backpressure, with exhaust gases making their way back into the cylinder and hampering subsequent combustion cycles. Thinner tube walls won’t stand long with increased temperatures in bigger displacement and engines with forced induction and deformities aren’t a rare sight. Your vehicle will be fine for everyday driving, just don’t expect anything spectacular.
Remus – The Primary Exhaust Provider For German Carmakers
One of the first companies to see success with their aftermarket exhaust lineups was Remus. Founded in the 1990s in the foothills of the Austrian Alps, the company soon became the primary exhaust provider for innovative and tech-driven German carmakers. With over 1000 employees designing, testing and producing bespoke exhaust systems for a range of cars and bikes, Remus has expanded its motorsports expertise (most notably the German DTM series for cars and the FIM Endurance World Championships for bikes) into real-world and affordable exhausts readily available to a wide customer base.
What Does Remus Bring To the Table?
Extensive testing on performance vehicles has led to Remus exhaust systems that up real-world power and transfigure exhaust sound. Changes in header and manifold designs have addressed issues with backpressure and instead contribute to higher exhaust velocity, meaning gases exit faster.
Put simply, the faster the combusted gases leave the car the more power on tap. And this is delivered in a smoother way, with linear power buildup through the rev ranges. Changes to tubing also allow for better exhaust scavenging and improved efficiency with lower fuel use. A by-product of all those goodies is the better exhaust note that Remus fined-tuned in its world-first and state-of-the-art acoustic room. These are all fantastic reasons for car owners to upgrade their rides with the various aftermarket Remus exhausts.
Build And Materials
Aftermarket Remus exhausts are built using mandrel bending techniques with internal wall supports that ensure width uniformity throughout the tubing. The tubing is more rigid as a result and this prevents wall crimping, a major factor in airflow restriction.
Another thing to consider is how the choice of materials affects performance. Stainless steel may be harder to work with, but has higher tensile strength, better resists high temperatures and is rust-proof. With added chrome, it also gives off a neater, polished finish. Weight savings and additional strength warrant the use of carbon, especially in the tailpipes (and knocking a few pounds off), whereas internals can be optioned in titanium for extreme strength and very low wear. Even mounting brackets and clamps are sourced from the same high-quality and coated stainless steel.
Exhaust Types And Configurations
Remus offers a range of exhaust systems, each having incremental performance gains as you add more parts. Most buyers will be happy with the look and raspy exhaust note of axle-back exhausts that swap out all stock parts from the rear axle to the tips.
To feel more push and shove, opt for a cat-back exhaust. Here you have more variations (and inclusions like a GPF back in direct injection petrol cars and DPF back exhausts in diesel cars). For track-specific cars, look for catalytic converter deletes and High Flow Cat systems with wider and straighter tubing taking the place of restrictive stock converters.
In addition, different mufflers and resonators are used in conjunction with electronic valve systems to differentiate between exhaust sound profiles. If you want to drone out excessive engine sound go for resonated exhausts but be prepared to pay for the privilege.
For the utmost in power gains, look to header and turbo-back exhausts. Manifolds and downpipes are re-engineered for optimal airflow and the whole stock tubing down to the tips replaced. Systems like these also provide for better turbo performance and reduced turbo lag times, feeding the turbines that much quicker and producing more low-down torque. Estimates are that gains in horsepower and torque range around 5-10 per cent of rated engine output. Enough for that extra shove when going down a straight or in highway overtaking.
Exhaust configurations vary from vehicle to vehicle and are dependent on things like the cylinder and turbo count and rated output. Single Remus exhausts are mainly reserved for smaller displacement three and four-cylinder engines ending in either a single or dual exhaust tip.
Dual exhausts (with two sets of piping) are often standard in turbocharged four-pots and 6 and 8-cylinder cars. Cars in a twin-turbo configuration for example will have two sets of headers and downpipes, often flowing into a single midsection just before the resonator and a laterally-positioned muffler, but have twin tail pipes coming out left and right.
There are also crossover exhausts with intertwining sections that help with exhaust scavenging and better combustion with cylinders firing at different times. The changes might be subtle from what your vehicle has as stock, but they’re more evident when you put your foot down.
Does Remus Have An Exhaust For Your Vehicle?
Besides producing OEM exhausts for the likes of Mercedes AMG, Aston Martin, Porsche, Bentley, BMW and McLaren, Remus also supplies aftermarket performance exhaust upgrades for affordable tuning favourites – the Ford Mustang and Fiesta ST, VW Golf GTi/Golf R, Toyota Supra and BMW Z4, Toyota GT86/ Subaru BRZ, Mini Copper S/ John Cooper Works and the Mazda MX5 among dozens of others. With three product lines to choose from (Sports Label, Powersound and Wild Label) there’s also the choice of electronically adjustable sound profiles (with 4 pre-programmed positions).
Systems are of the bolt-on type, allowing customers to start out small, as with an axle-back in the right configuration for make and model, and work their way up. For peace of mind, all exhausts are supplied with a three-year warranty.