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The MotorSport SLC (not to be confused with 928 MotorSports) X pipe and Y pipe systems are all that are available for the 928 currently unless you fab your own.
We have sold plenty of them and the power increase is significant.
Seat of the pants feel is awesome.
My GTS gained 25 rwhp.
85 & 86 cars seem to get the best bang for the $ and 30 rwhp is not impossible with a well tuned and sorted car.
Shipped the X system all over the World with nothing but happy customers.
My prices are the best around as well.
The high flow cats show no measurable difference on the dyno - with or without.
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