hi, i own a 2004 TSX from acurazine and i need your help....

this is my car:
6 speed carbon grey/black interior
Carbon Fiber Hood (stock hood: 38lbs CF hood: 20lbs)
Comptech rear sway bar
Injen CAI
Comptech Header
17x8 Kosei K1 TS (Gunmetal) (stock rims: 22lbs kosei: 15.4lbs)
Fuzion ZRI 235x45x17
Mobil 1
Carbotech Bobcat front brake pads (Red)
Axxis Ultimate rear brake pads
Muteki Super Light Weight Lugs (Black)
Hondata reflash
OEM spoiler
Buddy club N+ spec coilovers
Ingalls rear camber kit
Carsound high flow cat
Password JDM intake gasket

now I want to complete my ieh hondata tsx with a single exhaust for weight loss benefits....

im planning on going to A1 performance exhaust in Santa Ana, CA.
do any of you guys know of any other places i can compare?