Get the redline filter + edge entry level + GC for my Preve Exec from tyenfei a month ago.
That time just install the filter + vs, just feel a bit different on it because tyenfei say must install GC only will feel the different.
Last week go to workshop and install the GC, after run in 2-3 days, now less jerking while low speed. rpm is very smooth to increase. Wondering how powerful of BT502.

Yesterday get another product for my Preve Exec --> HUVS 303