Had all theses mods for my x7.
The red power tube i bought cos my plastic one had cracked. Made the marker sound different that’s about it. (with the red power tube you get a hex bolt also)
Orange bolt gave better gas efficiency
The spring kit can be a bit hard on balls in the winter. So you’ll need to swop depending on balls but a good mod
The zero kick is mint better gas efficiency and less kick
Best thing I bought was the egrip.
I also had a response. Allot of people liked theses but tbh I didn’t like it as it used more gas.
The red power tube i bought cos my plastic one had cracked. Made the marker sound different that’s about it. (with the red power tube you get a hex bolt also)
Orange bolt gave better gas efficiency
The spring kit can be a bit hard on balls in the winter. So you’ll need to swop depending on balls but a good mod
The zero kick is mint better gas efficiency and less kick
Best thing I bought was the egrip.
I also had a response. Allot of people liked theses but tbh I didn’t like it as it used more gas.