Just got a new header & cat installed...

[DD2]

... is it normal for my exhaust system to increase in volume significantly ?

[fitvpower]

yup! i got headers installed and normal revs its not loud but pass 3000 it has a deep tone and engine is louder!

[geeang]

Depends on the exhaust design, but in most cases answer is yes.

[DD2]

ahh..... i was surprised at the difference... idle it's silent, above 3000 it's deeper and louder, above 5500 it's crazy loud.

I mean i like it, just didn't expect the change.

[fitvpower]

ahh..... i was surprised at the difference... idle it's silent, above 3000 it's deeper and louder, above 5500 it's crazy loud.

I mean i like it, just didn't expect the change.

haha yea yours sounds like mine!
sounds good tho :thumbsup:!!

[RtN]

I think it's due to thinner header walls and more flow?

[SiReal]

even if running a stock catback? i.e. dc2r catback? would this still occur?

[MWAKU]

is it the same kinda sound like a K&N panel filter with no resonator or better

[RR-04-RR]

guys i'll test it out this weekend

B18c7 engine.. only has a CAI right now and i'll just install the headers alone and show a vid of before and after

[RR-04-RR]

alright guys since my last post... i've only installed my headers and a hi flow cat..

with the standard dc2r exhaust... not much sound at all.. very very simialr to stock.. much more grunt in VTEC though..

Will try edit my video and post it up

[aaronng]

The high flow cat has less muffling capacity than the stock cat, which acts like a mini muffler.

[EG30]

often you can hear exhaust gases rushing thru the header tubes, and with your new sports cat that would not only increase the exhaust noise but also the induction noise.

my eg b16a just had dc sports headers fitted to replace OE headers and while the exhaust didnt get much louder the induction noise from the CAI did sound a lot more savage post vtec.

[redefine]

often you can hear exhaust gases rushing thru the header tubes, and with your new sports cat that would not only increase the exhaust noise but also the induction noise.

my eg b16a just had dc sports headers fitted to replace OE headers and while the exhaust didnt get much louder the induction noise from the CAI did sound a lot more savage post vtec.

how would an exhaust side mod change induction noise??

[VT-11-RR]

it also depends on the exhaust size in regards to noise

[EG30]

how would an exhaust side mod change induction noise??

cos with better exhaust flow, the faster the engine can rid off the exhaust gases the faster it can suck in more fresh air for combustion.