Custom 1.75" catback exhaust - worth it?? - Toyota Yaris Forums

fuji · 05-08-2009, 06:24 PM

I had a 2" custom exhaust installed not to long ago. I was hoping to see a bit more oomph in the mid to upper ranges but the results have been slightly diappointing. I definately noticed the lack of oomph in the lower end.

I know most people would install a 2" or 2.25" piped exhaust but is there a way to constuct a free-er flowing 1.75" that would restore the lower end oomph while giving some benefit up high as well?

Any difference in power when adding resonators and high flow catalytic converters? Just better not to run a resonator???

gwasabi · 05-08-2009, 06:50 PM

leave it at 2 and get corolla tb

Is it a CAt delete?

gwasabi · 05-08-2009, 06:57 PM

Also, if you have a pulley set, you might want to change back your CRANK PULLEY to OEM. I noticed that the torque kinda sucks on the lower end with it on

fuji · 05-08-2009, 10:13 PM

The cat is currently in place. Is there any advantage to having a hi flow cat installed???

gwasabi · 05-09-2009, 07:46 AM

Keep the cat if you want the backpressure.

05-08-2009, 06:24 PM	#1
fuji Drives: Polar White Yaris HB Join Date: Dec 2008 Location: Honolulu Posts: 263	Custom 1.75" catback exhaust - worth it?? I had a 2" custom exhaust installed not to long ago. I was hoping to see a bit more oomph in the mid to upper ranges but the results have been slightly diappointing. I definately noticed the lack of oomph in the lower end. I know most people would install a 2" or 2.25" piped exhaust but is there a way to constuct a free-er flowing 1.75" that would restore the lower end oomph while giving some benefit up high as well? Any difference in power when adding resonators and high flow catalytic converters? Just better not to run a resonator???

05-08-2009, 06:50 PM	#2
gwasabi View User's Garage Drives: 07 Blazing Blue LB Join Date: Jun 2007 Location: Honolulu, Hawaii Posts: 692	leave it at 2 and get corolla tb Is it a CAt delete? __________________ Most Satisfying Crew Serious Business... MunkyWurks Garage - 8088488794

05-08-2009, 06:57 PM	#3
gwasabi View User's Garage Drives: 07 Blazing Blue LB Join Date: Jun 2007 Location: Honolulu, Hawaii Posts: 692	Also, if you have a pulley set, you might want to change back your CRANK PULLEY to OEM. I noticed that the torque kinda sucks on the lower end with it on __________________ Most Satisfying Crew Serious Business... MunkyWurks Garage - 8088488794

05-09-2009, 07:46 AM	#5
gwasabi View User's Garage Drives: 07 Blazing Blue LB Join Date: Jun 2007 Location: Honolulu, Hawaii Posts: 692	Keep the cat if you want the backpressure. __________________ Most Satisfying Crew Serious Business... MunkyWurks Garage - 8088488794

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05-08-2009, 10:13 PM	#4
fuji Drives: Polar White Yaris HB Join Date: Dec 2008 Location: Honolulu Posts: 263	The cat is currently in place. Is there any advantage to having a hi flow cat installed???