There's actually a nice number of different systems.
Racing Beat
Racing Beat is proud to offer a complete three (3) piece cat-back exhaust system for the 2005 Protg 5. This exhaust system is manufactured using 304 stainless steel tubing, flanges, internal components and muffler canister for superior durability and appearance...Dyno testing of the Racing Beat cat-back exhaust system showed a peak HP gain of up to 4.7 HP @ 5700 RPM.
Skunk 2 Skunk2 Racing cat-back systems are constructed from T-304 stainless steel and feature Japanese Super N-1 design and styling.
Bosal Chameleon and Stainless Steel. For more info:
Protege5online.com
Flyin' Miata/Thermal exhaust 2.25", full stainless cat-back exhaust made with Thermal's great quality and a classy 3" exhaust tip. Resonator included. This exhaust is intended for normally aspirated cars.
MBRP According to an auction on ebay, they have one available; however, it is not listed on their site. Here's the ebay link:
Exhaust on Ebay It's a mandrel bent t-304 2-1/4 tubing and fully polished high flow mufflers which create a deep, clean exhaust note, as the RPM's increase it will create a tuned sound you can appreciate!
JIC Magic Semi Stainless Real semi stainless sport muffler. The exhaust system's canister is made of stainless steel.
JIC Magic Full Stainless Lightweight stainless steel. Real sport muffler. Designed inspired by the N-1 endurance race series in Japan. Full stainless steel exhaust system.
JIC Magic Full Titanium Rishie has said he's going to be bringing in some full titanium exhausts.
Team Moon The P5 system use a polished stainless steel muffler
with a 4" tip. The tubing is aluminized mild steel, 2.25" mandrel bent.
I'm not sure if tripoint has one.
Ok, I'm off of work now. I just spent the last 2 hours looking this stuff up. Which is best? I have noooooooo clue. But if you figure it out, lemme know.