Stock pipe size?

[hawaiiannights]

Sorry did a search and couldn't come up with anything.

What is the stock exhaust piping size on the Pro5? I noticed most aftermarket exhausts for our car is 2.5" so was wondering how much bigger over stock it is. I'm taking a guesstimate that its like 1.75 or something? Thanks....

Thinking about making a cheaper custom exhaust.

 

[changedman]

almost 2" i believe 1.9 or so.

 

[CitizenPro]

2.5" may be alittle big for the P5 with out a turbo or something in that nature. The 2.25" piping may be more like it with the basic bolt-ons......but hey thats just my 2 cents.

 

[hawaiiannights]

You may be right...no back pressure so might loose low-mid end power as well...... I was thinking of going 2.25

 

[70]

Yeah, that funky "downpipe" from the first cat is about 1.75" ID. Then it goes to about a 2" ID from there on back.

 

[hawaiiannights]

Thanks guys!

 

[MazdaVK5]

I have 2.5inch piping cat back w/o a resinator and a Magnaflow muffler paid $300 for the whole thing and it tends to back fire just a little but you deff can feel the gains add an intake and you got power..

 

[hawaiiannights]

Yea I have an homemade cold air (kinda) type of intake already....didn't think it would back fire though?.... do you like it? where do you feel the gains i'm assuming it would be on the highway on high end power?....

I'll probaly go with an apex type muffler with 2.25 pipe

 

[FrigginGLI]

I feel the gains with my magnaflow. 2.25 inch piping.

 

[mp5jeff]

I have 2.5inch piping cat back w/o a resinator and a Magnaflow muffler paid $300 for the whole thing and it tends to back fire just a little but you deff can feel the gains add an intake and you got power..

so your retaining BOTH cats yet are still backfiring? sounds like bs to me

 

[MazdaVK5]

straight pipe with one cat which is contained as part of the header...and cars can back fire just fine with cats my friend civic hatch backfires worse than a V8 its just all snap crackle and pop...you dont have to believe me but its possible i hear it all the time

 

[MazdaVK5]

back to the topic at hand....i noticed a give gain in the 0-60 time the car rev's alot faster but tends to eat gas as well but nothing major...i hit 6000rpms in 5th gear at about 122 b4 the exhaust and then at the same rpm i was doin around 127 so top end it added a little more

 

[hawaiiannights]

Thanks I think i'm gonna do this with a 2.25

 

[mp5jeff]

back to the topic at hand....i noticed a give gain in the 0-60 time the car rev's alot faster but tends to eat gas as well but nothing major...i hit 6000rpms in 5th gear at about 122 b4 the exhaust and then at the same rpm i was doin around 127 so top end it added a little more

is this a joke???