V3 Equal Length & Long Tube Headers
by InfinityDesign

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.


Matt / @m3_epoustouflant
Journal Entry

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.

Read my unboxing

The Specs

Long tube design

The design retains an even 42mm diameter across the runners, while achieving the required length through unique curvatures for max performance.

Equal lenght runners

The equal length design retained the signature S85 exhaust note, while being the best performing header solution on the market.

304 SS & TIG welded

They are TIG welded and made from 304 Stainless Steel. Each runner is individually tagged and aligned to slip into the merge collector.

Fits with OE sensors

Bungs for pre-cat, post-cat and temperature sensors were cut, fitted and welded to the headers.

Hear it.

V3 headers + aftermarket exhaust.
Spec your headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
V3 Equal Length & Long Tube Headers
Infinity Design


V3 Equal Length & Long Tube Headers

Regular price $3,399.00 Sale price$3,299.00
  • Factory Direct Process


  • Equal length long tube header design
  • Retains F1 style S85 exhaust sound
  • 42mm runner diameter for optimal performance on 5.0 displacement and strokers
  • Gains of up to +/- 70whp and wtq when paired with tuning
  • 304 Stainless Steel Construction 
  • Bungs for pre-cat, post-cat and temperature sensors.
  • TIG welded  
  • Deletes primary catalytic converters
  • Fits LHD and RHD 

stage 3 tuning by Sal @ InfinityDesign
Gains of up to +/- 70whp with tuning.

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.

Infinity Design

S85 DME Tuning by Salman

Regular price $600.00 Sale price$579.00

It's gotta be the shoes!

I often say flash tuning are sold like Jordans. 

A fundamentally technical & technological product that gives us an edge yet very few of us actually understand the wizardry involved. Some tuners downloaded their files from “somewhere” and sell it for cheap, others just boost throttle mappings for some placebo. 

And we fall for it. 

Read more about how I discovered Infinity Auto Design and its head of product; Salman. I also give my first impressions on Stage 1 tuning and the process to getting it tuned

Developed by the Grand-Daddy of S85 tuning: Sal. 

Salman Janjua is the previous owner of Evolve and known for having developed some of the most popular, quality products for the S85.

The Infinity Auto Design DME tune has been offered for over 10 years across various different brands and tuners using Sal's tunes. It is the longest running tune with cars  across the world flawlessly and delivering unrivalled drivability and performance.

He developed the tuning files on multiple company and personal owned cars both on road and dyno. 

"Like caffeine for your V10"

The BMW S85 engine responds incredibly well to tuning with changes made to ignition, VANOS and torque maps. Power gains are felt and measured throughout the RPM range accompanied by sharper throttle response and a smoother overall power delivery.

A realistic and repeatable peak 30hp @ 7800rpm gain with 20lb.ft @ 6250rpm torque is achieved with a peak gain of 35hp @ 8000rpm when primary catalytic converters are already removed. 

Dyno graph of stage 2

Improved Fuel Consumption (seriously)

Our thirsty beasts will never be Prius, but 20 liter to 100km has always been a completely ridiculous number. 

The stage 1 tune on my S85 noticeably reduce consumption - no jokes! I am never frequently able to hit 400km on a 60 liter tank. 

I can live with 15 liter to a 100km. 

Stage Tuning

Tuning is often offered in "stages", it's a useful rule of thumbs. Here's how Sal defines his stages. 

Numbers are based on stock S85 dynojet figures of 430whp. 

Stage #  Required Modifications Expected Peak Power
1 None. I highly recommend the sealed air intakes 450whp
2 Primary cat deletes & aftermarket long tube headers. 470 to 475whp
3 Optimized for V3 long-tube, equal length headers. Further mid-range gains of 10whp 4000 to 6000rpm.  490 to 500whp
3+ Custom tuning for S85s with cams, strokers and/or superchargers.  Case by case.


  • Compatible with AlphaN and MAF modes
  • Raised RPM limit to 8500rpm
  • VMax Limit removal
  • Cold start delete
  • Power calibrations with changes made to ignition, fuel, torque and VANOS maps
  • Comes with tuning device, OBD2 cable and USB cable. 

Tuning Process

  1. Once your order is completed & paid, Sal will communicate with you to validate your tune specifications. 
  2. Once you receive the included hardware, follow the accompanied instructions.
  3. Summary of instructions
    1. Extract the OEM DME file using the OBD2 Cable & Tuning device. 
    2. Install tuning software to your PC (not Mac compatible).
    3. Upload your OEM DME file to your PC using the software. 
    4. Email the file to Sal. 
    5. Wait 1-2 business days. 
    6. Download the new tuned DME file to your computer. 
    7. Upload to your tuning device. 
    8. Plug into OBD2, turn on the ignition, flash your vehicle. 
      *during the flashing process, it is normal to see lights, warnings and other electronic signals. It last a minute or two. 
    9. Turn off ignition, unplug the tuning devine. 
    10. Start your S85, and enjoy. 


technical journal entry
There's a method to the madness.

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.

Sal @ InfinityDesign
Legacy knowledge.

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.

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