M04 9-5 Aero gets dual Hirsch exhaust!

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Photo: Hirsch

For a while ago I got the chance to buy a Hirsch exhaust system for my 9-5, the only problem was that the system was not fully compatible with my car. The system we talk about is the fancy dual exhaust for 9-5 M02-M05, but NOT for the M04-M05 Aero and car with the M04-M05 Aero-look (which is a very popular visual upgrade for M02-M05 here in Scandinavia). My 9-5 is just an M04 Aero sedan, and basically that not will fit is the rear bumper layout. The Hirsch webpage says “Please order the single pipe exhaust system instead”… But at this stage I already decided, I want this and would give it a shoot. I have always liked this exhaust system,  from the moment I saw it on a full Hirsched 9-5 Aero with the 305hp package at ANA Trollhättan back in 2003.  After I ordered the system from Cardyourcar.eu it became clear that the middle pipe from the cat to the Y-pipe wasn’t in stock, but luckily Cardyourcar managed to find some more middle pipes. Since it took a while from I ordered the system to I got it delivered I got plenty of time to thinking how to solve the fitting in a optimal way. In the end I decided that if the system absolutely didn’t fit, I would change to a compatible bumper from a standard 9-5, and use the Hirsch “diffuser”.

So, a few days ago I got four large parcels delivered, and the fun could begin! The system is built up by four parts, it starts with a 3″ middle pipe with a silencer and a flexi part. Then we have a 3″-2.5″ Y-pipe, and two tailpipes with a silencer on each pipe. Before I had Maptuns 2.5″ sports system mounted on the car about 2 years/40 000km’s so the disassembly was not a big issue, as it otherwise tends to be when replacing the exhaust system. If we look away from some mounting components that was pretty rusty the disassembly went quick. The biggest issue was the bolts that link the downpipe and the flexi-pipe, but with some special equipment (cutting disc) the assembly could begin. When I mounted the Maptun system I thought it had a very good fit and everything went pretty well, but the Hirsch system is perhaps slightly better! Obvious I began from the front with the mounting the middle pipe and the Y-pipe without completely tighten the screws so I have a opportunities for adjustment later, before I took a cardboard and marked out the opening for the tailpipe with a ink pen. Then I mounted the rear silencer on the left side, before the custom work on the right side started.

Read moreM04 9-5 Aero gets dual Hirsch exhaust!

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