[Jeff@TopGearSolutions]

Originally Posted by romanonj

FMIC prices vary significantly. Price difference between ETS and VRSF are huge..

VRSF $400 - from the pic looks like good quality product, 5" inch is direct bolt-on with only clamp replacement required.
http://www.e90post.com/forums/showthread.php?t=731541

ETS are starting at $695 for 5", and $175 additional for 7"
http://www.topgearsolutions.com/ets-...-bmw335co.html

Than there is Active Autowerke, also close to $700
http://www.topgearsolutions.com/bmw-...port-fmic.html

So what are the differences? If we say they are all the same, or close to being same, what do I need to look at to justify the additional costs? I have no problem speding $400 extra for quality product, just want to be able to justify the additional costs. What are the things I look out for?

We more then welcome to explain the differences into detail. Shoot us a message or email.

Some people just buy fmic based on cost, others on quality of matierals, and others based on performance or a combo of all 3.

When seeking the highest quality materials crasftmenship and performance we recommend the Evolution Racewerks and ETS, both made in the USA too.

Performance wise many perform simiarly, you can only gain so much power from an FMIC.

The difference between 5 and 7 inch normally is that the 7inch will be less prone to heat soak and will perform better for road racing or very hot climates.

Lots of people think the FMIC they have is "GREAT", and im sure it is good but others are better then some in the ream of heat soaking or lack there of.

ON a single gear pull they should all perform similar. Typical gains are 15-20WHP from all of the popular upgrades.