Guys,

I'm a new owner of a Mazdaspeed3 and I'm looking on the net what is available to increase the hp of the car. I found something where they mention to change the downpipe because the actual design is great for slowing turbo spool up, reducing engine Volumetric Efficiency, and improving emissions performance by creating a massive restriction. So, I would like to know if by doing this modification we can lose the car warranty and if the chip needs to be reprogram.

Thanks to anyone that have any informations regarding this.

FR