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Trust me fella, as soon as you start f**king about with the 197/200 system they give you flat spots, standard, or uprated. Mates just got a 200 janspeed unit, and that's made it flatspot lol
Took my centre section out on my 197, there was a slight increase in flatspot. But when i was ranting it, sounded good. Now i have a K-tec system with a remap and decat.
If you just want some sound go for a powerflow back box. Mine has no flatspots at all and feels a bit better. Sounds a lot deeper and quite throaty compared to the other aftermarket systems like k-tec, miltek etc. Looks good and ive had no issues with it at all.
Took my centre section out on my 197, there was a slight increase in flatspot. But when i was ranting it, sounded good. Now i have a K-tec system with a remap and decat.