rchut1

37 minutes ago, jeffy said:

 

2.25"-2.5" would be more ideal for your setup

it will pretty much be replacing most of the piping from the headers.

Its probably a flex pipe (bendy pipe between headers and cat)

 

 

Image below shows an exhaust "system" - (full exhausts systems go from headers all the way to mufflers) (some systems only go from the catalytic converter to the muffler or - cat back systems for short)

 

 

 

sorry i think i misunderstood you initially.. the term " straight pipe " refers to literally a pipe going straight from headers(exhaust manifold in above diagram) to the muffler (some may not even have a muffler) .. the cat (catalytic converter) is there for emissions, and the muffler muffles the sound, resonators (not resignators) are also used to reduce drone.

thank you so much for your info, ill be ordering a full new exhaust with a different pipe size. hopefully ill book in asap, hoping to get my original power back (fingers crossed)

4 hours ago, jeffy said:

having some doubts with your exhaust "specialist" mechanic.. because ive never heard of such a thing, but anyway ... if its got a cat, then that's not a straight pipe - if what im reading is right: im gonna assume youve changed to a 3" piping all the way.. and thats your issue there... exhaust piping too big (bigger doesnt mean better in your situation), youve just created backpressure, and youve most likely lost some rpms in the lower end

thanks for reply, I feel as yeah the car has lost power in the lower revs 100%! from what the mechanic showed me while the car was on ramps it that the pipe coming from the engine to the end of the car was fully replaced. looking on the invoice it shows yeah he has changed it to "3 piping do you think a lower size piping will increase performance again or will I need to replace the entire exhaust ?

Hi there,
I recently took my corolla in to get an exhaust change. The mechanic was a exhaust specialist he fully changed the exhaust adding basically a straight pipe with two 1/2 resignators and a 3" cat convertor. after the mechanic changed the exhaust i've noticed a significant power loss my car certainly feels heavily affected, I wont lie its the most insane noise you have ever heard I cant drive anywhere without every person turning there head , even when the lift starts at 6k it basically feels the same the whole way through. i'm now wondering if I should replace the exhaust back to stock. does anyone know why im losing power or what I can do to fix my problem. thank you for your time

too add my previous 0-100 in this car was 5.9 seconds now its 7.5-8 with this current custom exhaust