Magnaflow performance loss

[SP543]

I had installed a magnaflow single in dual out muffler in the stock location with stock piping yesterday, part #12590, and I drove it today and it sounds great but seems a little sluggish. Is there a break in period or something, or any way to gain that performance back? It's only from slow speeds and accelerating, I'm kind of angry cuz I wouldn't have replaced it if I knew this was gonna happen.

 

[ezdaar]

stuff a banana in one of the pipes

 

[MrBalll]

Did they shrink the exit piping from what stock was?

 

[SP543]

The y pipe in the rear leading out from the muffler are both 3 inch, they fit fine into the muffler outlets which are 3 inch as well. Will a resonator help?

 

[ezdaar]

Tellin ya man! Stuff a in there!

 

[felixgun]

Resonator just makes it more quiet. The tone will change over time. At least my magnaflow on my Tahoe did... I don't know if the performance will change.

 

[SP543]

Could it have to do with the engine getting a lesser amount of backpressure compared to the stock exhaust?

 

[ezdaar]

yess, you need to equally open up the intake to match the exhaust flow and tune it..
that sluggishness will go away

 

[bkboatnsleds]

yess, you need to equally open up the intake to match the exhaust flow and tune it..
that sluggishness will go away

Yep.

I have a gibson headers, magnaflow exhaust and K+N intake with a tune - no lack of performance.

 

[hoe]

Tune wise guy. Then come back explaining the gains. lol