only mod i see is that after the cat is it has 2.5 straight back, and ive read the digital manuel tons of times yet i dont understand how to test my egr for proper operation, and my timing is perfect at 10 degrees btdc. as for the cat like i said before i have no idea when it was last serviced or replaced but i believe it was round late 05 to early 06, but when i picked up the car for my motor swap it had been sitting outside in like a yard/feild (not being cared for at all) like the muffler was replaced because it was rotted out when i got it other than that thats all ive changed
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