Centerline Stradale Exhaust for Giulia Quadrifoglio by Magnaflow
We are pleased to announce our new Stradale exhaust system for the Giulia Quadrifoglio . As many of you know, we have been developing and testing this system for quite some time, and we feel we have achieved our goal of designing the ultimate performance exhaust system for the Giulia QV. The design brief was to really push what could be achieved with this vehicle, instead of simply copying the factory exhaust design with larger diameter tubing. Our experience with classic Alfa Romeo engines – specifically the fabulous sounding Giuseppe Busso-designed 2.5 and 3.0 Liter V6 engines – gave us some specific goals but also set the bar very high for this exhaust.
The Stradale system was jointly developed by Centerline International and Magnaflow. The Stradale features 100% stainless steel mandrel-bent construction with a full 3” (76mm) diameter, which is a 30% increase compared to the factory exhaust. A Magnaflow X-pipe replaces the stock front resonator, and the rear section features a transverse muffler with a full external bypass and quad 4” diameter tips in either stainless steel or optional carbon fiber. The rear section incorporates vacuum-activated (OEM style) valves on the bypass circuit. The production systems will be ceramic in a semi-gloss titanium color, which will look great and also help contain heat.
With the valves closed, this system sounds deep and smooth. We definitely wanted it to be heard more than the OEM exhaust, yet still remain unobtrusive inside the car. With the valves open in Dynamic or Race modes, the system really comes alive with a loud, raw and snarling sound. We find this to be especially intoxicating in Dynamic mode, as the valve changeover event at 3,500 rpm is now very distinct and pronounced. With the bypass activated there are absolutely no mufflers or resonators in the system between the catalytic converters and the exhaust tips!
These systems will be released in a limited edition of just 25 units for 2018. Each system will be accompanied by a keychain and badge, both with the individual serial number of the system on them. These systems are priced at $2,995.00 with stainless steel tips and $3,795.00 with carbon fiber tips.
In March of 2016, we began the design process for this exhaust. We took a beautiful black Giulia QV to the Magnaflow Technology Center in California, where I was fortunate enough to be allowed to play a hands-on role in the design and testing of this system. The Magnaflow facility is impressive; to me it represents the best possible mix of modern, high-tech equipment and passionate, skilled craftsmen with the specialized experience and know-how to create performance exhausts.
The first step of the design process was to evaluate and understand the OEM exhaust, and identify areas we felt could be improved upon and then define our goals for the new system. The OEM exhaust is well constructed, but can sound flat at certain engine speeds and has a considerable amount of raspiness when the valves are open. It also showed significant uneven heat discoloration in certain areas which indicated flow obstruction. We felt an exhaust with a deeper and smoother overall tone would both sound and flow better, as excessive raspiness is often an indicator of bad harmonics inside an exhaust system that can be harmful to flow.
With our goals identified, we tried multiple exhaust configurations, from stock to wild, and began narrowing down the design for the first round of prototypes. In total, we tested 7 complete prototypes over the following months before arriving at our final design. While many of these prototype designs sounded really good, we were looking for something more – the elusive “X-factor” that makes you fall in love with an exhaust - and kept refining the design until we found it.