What are /r/OnlyZ900's favorite Products & Services?

From 3.5 billion Reddit comments

https://www.amazon.com/gp/product/B085DMV7XD/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

It's not the best considering the Z900 doesn't have the best place to mount a phone mount - but I've had it for the past 3-4 months and it's worked good

I do actually KAJIMOTOR Motorcycle Stainless 51mm/ 2" Inlet Motorcycle Systerm Exhaust Muffler Tail Real Carbon Fiber Pipe For Kawasaki Z900 2017-2018 https://www.amazon.com/dp/B07WVCJLR4/ref=cm_sw_r_apanp_d5g6As8S6pSPs

And then I bought these to compliment it and the springs that came with the pipe weren't great AUTUT 2 Pcs 35mm Stainless Steel Motorcycle Exhaust Muffler Pipe Swivel Spring with 2 Pull Hook, Blue https://www.amazon.com/dp/B07QS176HY/ref=cm_sw_r_apanp_bFovvptnc16MB

It sounds a lot more aggressive under load but it still pretty restrained. Most of the muffling comes from the bread box so it isn't a huge change, but imo sounds 100% better