Here is the deal. I have had a RPI Exhaust and Dp on the car for about 8,000 miles. My car has 21,000 miles on it.
For awhile the car sounded fine with the set-up and for about a month it started gurgling. I rather liked the sound of the gurgling and it got worse everyday.
Last night I was driving my car and when I changed gears from 2-3 with RPM's at 3-3.5 my engine started backfiring, or maybe it was the exhaust. I'm not really a gearhead type so the technical aspects of all this elude me.
The backfiring was a popping sound, but really really loud. When I say loud I'm talking 5x louder than a 70's muscle car with a straight pipe and no cat. I will just say it doesn't sound good at all. It sounds as though the muffler or dp have something to do with it.
One thing I will mention is my turbo solenoid and factory blowoff valve (RECIRCULATING VALVE) may not be opening and closing properly and solenoid not working.
-When I stop the car it usually stops until the revs get above 4k rpms
-It stops or is much quieter if I keep revs low
-It doesn't happen when my foot is lightly on the gas.
-It still happened if I engage the clutch and put shifter in neutral, but when the engine winds down it is quiet again while cruising
-**WHEN I PULLED INTO A PARKING LOT AND PUSHED THE PEDAL TO KICK UP THE RPM'S THE ENGINE BACKFIRED, SOUNDED FUNNY AND WOULDN'T BREAK ABOVE 4000RPMS. It will run up to redline if I am on it with no problems except MAYBE the backfire...
QUESTION: Is it normal for a "stainless" exhaust to have rust on it after less than 1.5 years and are exhausts warrantied?
QUESTION: Is RPI a sponsored vendor?
Sorry for the drawn out msg