The zenith of naturally aspirated M engines were still restricted
The S85 and the S65 were the pinnacles of naturally aspirated engine development by BMW M. Their engineers managed to create equal length headers for the S85 and S65 giving them their signature sound.
However, V10 has its primary cats right after the merge collectors and are built into the headers.
The design immediately impacts exhaust flow and pressure - inhibiting potential performance from the S85B50.
The V3 headers are the ultimate solution.
Enjoy,Matt / @m3_epoustouflant
Power without sacrificing the S85 legendary exhaust note.
In this in-depth journal entry, I write about BMW M's header development, restriction and the history of compromised solutions.
I dive into why I regard the V3s as the best option on the market, and ultimately fitted a set to my V10 M5.
The design retains an even 42mm diameter across the runners, while achieving the required length through unique curvatures for max performance.
The equal length design retained the signature S85 exhaust note, while being the best performing header solution on the market.
They are TIG welded and made from 304 Stainless Steel. Each runner is individually tagged and aligned to slip into the merge collector.
Bungs for pre-cat, post-cat and temperature sensors were cut, fitted and welded to the headers.
Salman developed a Stage tuning map to tap into the optimal performance potential of the V10 M5 fitted with V3 headers. He also eliminates the Check Engine Light (CEL) from your dashboard.
Red is stock.
Green is headers without tune.
Blue is headers with stage 3 tuning.
This journal entry was done in collaboration with the guys at InnovAuto who did the installation.
You'll find tips, tricks, notes and the required hardware.
InfinityDesign's unique product design and engineering is crafted by the grand-daddy of the most popular S85 products and tuners to hundreds of S85s.
As a former Evolve co-owner, he took part in engineering the headers & e-tronic exhaust system, cat deletes, carbon intakes, v8 supercharger kits and tuning maps during the 2000s and early 2010s.