what is dimensions of stock resonator for 1.8 ?

[rieds]

anybody know this? i have my weapon r header and borla 40358 muffler and im ready to go to the exhaust shop and have them installed with 2.5 inch pipe minus the resonator except i'd like to know the dimensions for the stock resonator in case its too loud for me without it so i can have one picked out thats easily purchased locally. i believe the one on the 2.4 is the same as the toyota parts diagram list the exact same parts except for the manifold for both the 1.8 and 2.4. i'd like to change the cat too but i only have 20,000 miles and a few people have said i'll have cel trouble with a high flow cat.

[rieds]

threw the car on some ramps today and crawled under. stock resonator is 12" chamber, 20" overall, 5"diameter. the stock exhaust is 2.5 inch from the header to the resonator. the resonator is 2.5" in but stock size out. i believe its 1 3/4 or 1 7/8. so as long as the cat flows good enough a cat back system with header should get the job done.