M5 Guru (>2000 posts)
Join Date: Jul 2012
Location: Jakarta, Indonesia
Thanked 226 Times in 203 Posts
Big bore Y pipe done, it will be fitted this week.
A bit rough around the edges but ok for an experiment.
Can anyone suggest a freeware or inexpensive CAD package for the Mac ?
I don't want anything fancy, just something to produce cutting templates for pipe and other shapes
Weight is 13kg, about the same as the original pipes and 2 mufflers (already removed), I may save 2kg, I'll know when I weigh the pipes I remove
I used 2mm wall thickness pipes to reduce drumming and vibration, I could have gone a lighter gauge pipe but worried about acoustic drumming in the passenger cabin.
Pipe cross section is almost double the twin OEM pipes
Tony, Aussie expat in Jakarta Indonesia
1990 E34 M5 S38B36 GA25324
1995 E34 540/5 Project
Last edited by AseanAero; 7th October 2013 at 12:59 PM.