I have upgraded the fuses in my 1.6's and 3.7's.
Yes, there was an improvement.
There are a variety of fuses and prices to select from. I eventually purchased the Verastarr "Experience Truth Audio Upgrade Kit" which uses a Fuse Bypass. If a fuse bypass doesn't bother you, contact Mike Powell at Verastarr and see if he can assist you. The fuse bypass (a silver plated tube the size of the fuse) was an inprovement over designer fuses.
Yes, there was an improvement.
There are a variety of fuses and prices to select from. I eventually purchased the Verastarr "Experience Truth Audio Upgrade Kit" which uses a Fuse Bypass. If a fuse bypass doesn't bother you, contact Mike Powell at Verastarr and see if he can assist you. The fuse bypass (a silver plated tube the size of the fuse) was an inprovement over designer fuses.