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Nope...the reducer is in the begining of the mufflers, take off the muffler and look in the side that ( connects) to the headers, you should see a 1" reducer. It goes gradually from 1 3/4" into a 1" hole. If you clear everything...theres no real backpressure...what stage are u at right now and what are u thinking about doing?



I made the reducers for my thunderbike pipes. I have 130's, TBSw/1 shim, UNi, drilled, snorkel removed. The reducers killed it. I never noticed reducers in the stock pipes, but if thats the case i gotta wonder it thats a big part of the restirction because like i said the reducers i put in the TB pipes killed the performance in a huge way. I lost everything from low to high probably 30%. Bike felt like it went from 60 HP to 45 or 50.