Got a 200 sl1 and Saw these on sale at my local Canadian Tire for 4 bucks off a package of 4. I tried them out and defiantly an improvement in torque and smoother acceleration (5 speed manual and tons of hiway driving).
I should also note I changed my PCV valve which was grungy and oily so maybe that has some influence too....
Any long term implications of keeping these things for 35000 to 50000 KM? do they ruin valves, piston score etc? What about fuel Consumption?
Thanks for any input