last year i had to go to 68 grams on my ods ck due to the d&d y pipe and bmp stealth pipe. well i removed the mbrp can i was running last year and put the stock one back on. now its pulling to just over 8000 rpms again. so to get it down i need to go with more weight and 70's are the next step. so i guess i just wanted to see if any of you guys have run into this issue or if you think something else is up.