I have 1999 hayabusa and Thinking of getting a Brock’s Alien Head full exhaust but see it’s technically meant for a gen 2. But I also see it being ran on gen 1 busa’s. I found few people ran this exhuast without a tune or pc on a gen 1 as long as they didn’t have air box mod? If that’s not true and it needs a tune or pc I’ll hold of on exhuast and go for pc or 32bit ecu to get it tuned when I grab that exhuast. Don’t want to melt anything if I will go lean. But I imagine wouldn’t be much more lean then shorty tips on a stock header like I have now?