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Old 12-15-2015, 10:01 PM   #1
Jfheisenberg
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Invidia N1 + Invidia catless front pipe question

Recently, i got installed the invidia N1 and pair it with my invidia catless front pipe. This combinations produces a nice rumble when letting off the gas, when downshift, and occasionally during accelerations.. i think it sounds great.

My questions, how is that rumble produced? Is it coming just from the catback or does the engine plays part on it?

Reason i ask is because to my understanding, the "subaru rumble" sound is produced by UEL headers, and the stock header in the BRZ is equal length.

What do you guys think?
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Old 12-16-2015, 04:17 AM   #2
mizzta21
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Less cats/resonators to negate the sound I guess...
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Old 12-16-2015, 04:19 AM   #3
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Originally Posted by Jfheisenberg View Post
Recently, i got installed the invidia N1 and pair it with my invidia catless front pipe. This combinations produces a nice rumble when letting off the gas, when downshift, and occasionally during accelerations.. i think it sounds great.

My questions, how is that rumble produced? Is it coming just from the catback or does the engine plays part on it?

Reason i ask is because to my understanding, the "subaru rumble" sound is produced by UEL headers, and the stock header in the BRZ is equal length.

What do you guys think?
by the way, do u feel a difference in throttle response or power with a catless frontpipe? Is the torque dip minimized?
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Old 12-16-2015, 07:28 AM   #4
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Originally Posted by mizzta21 View Post
by the way, do u feel a difference in throttle response or power with a catless frontpipe? Is the torque dip minimized?
torque dip is still there... the gains are on the top ends rpms i believe..
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