I for one have this set up and had the exhaust for 6 months before I added the test pipe. I have had both for 2 months and it seems the exhaust has gotten louder, it even seems to backfire when shifting between gears.
Has anyone experienced this? I want to know if this is normal or if maybe something is wrong with the exhaust.
Thanks.

 

yeah i have this setup
it is a lot louder especially at vtec

and yeah i do get some backfire too
if im cruising in a gear around 5000 rpms and
let go of the gas i can hear it backfire

-rick

 

I agree, it is louder and VTEC is sweet, but the backfiring concerns me....

 

AP1's run rich anyway

you can always get a VAFC or EMS to tune it a bit

i wasnt too concerned about the backfiring but
one night my buddy was following me and i took
2nd to redline and let off and he told me no bullshit
i had blue flames shooting out
after hearing the backfire i guess its possible but
i have yet to see it

 

bump. Anyone else out there?

 

I have the same setup, and yes, every once in a while I might hear a very slight backfire.

VTEC sounds 1000000x better with a test pipe. I must say, it's the best sounding exhaust in vtec when running a test pipe.

 

I run this setup too, I also had the exhaust for 8 months before getting the test pipe. Backfire happens when decellerating when still in gear, and during shifts, it has become one of those noises that I just accept. I agree, one of the best sounding setups available for the car. You guys notice the reduction of the drone with the test pipe? It's great!

 

I will be in a few weeks

 

I have this setup but I've never once experienced it backfiring.

 

I also have this setup , incredible sound , other drivers always ask me what have i done to my car Although the car is backfiring all the time. It's time to get an EMS , i think