Hi guys, just did decat(4-2-1) and s flow muffler on a campro iafm manual without touching the stock midbox and piping..

As a result I feel a loss of power and torque and a weird noise with CEL on even after reset.is this a result of lost back pressure due to the stock midbox?

sifu,

im driving persona year 2009, original campro.

due to crack manifold, i hav chg it to 4-1 extractor (stock using 4-1 iianm) and decat.

b4 this, i m very satisfy wif stock exhaust system, wif only chg in muffler (marco).

but after chg to 4-1 extractor and decat, i suffer loss in pickup. its a huge diff if u ask me, need to rev up hi n very noisy sound at the engine.

if lets say i wan to hav the same setup as stock which is:

stock manifold(4-1) > catcon > midbox > muffler

but right now mine is:

4-1 extractor > midbox > muffler

if i put bullet which will become like this:

4-1 extractor > swirl bullet > midbox > muffler

will i get the same (or at least a lil bit same) setup like b4?

im driving every week for 4 hours straight, so long distance driving is making me crazy wif this condition.

thnx

Thinking of getting PZ extractor.. Which shop got sell? Preferably arnd kajang area.

PZ tutup already if I am not mistaken