Things to look at when purchasing an exhaust:
1. Diameter, too big is never a good thing
2. Note of Exhaust: Straight/Chambered, Internal packing mat.
3. Material produced in piping: Mild steel or Stainless Steel
4. Coating of material if mild
5. directly related to #3 is the WEIGHT of the system
4. Aesthetics: To suit your needs; Big Can, small can, bullet style=straight through, or chambered/oval style can.
I have had the Bosal, Racing Beat, and JIC. We have guys with custom catbacks as well. Both Magnaflow and Ractive custom setups have been seen and heard.
For starters: any mild steel system like Racing Beat will be close to 50lbs, similar to stock with resonators.
For me the Bosal was the best "Bang for buck" but did not the aesthetics I desire for the P5. It's can hung to low and the tip somewhat small in comparison. The sedan however is another story. It looks great. Lots of internal cabin noise in comparison to the rest. Weighs about 27lbs, no resonator and nice finish.
Racing Beat: Most quiet. Almost like a good factory system. At WOT is when you hear it, otherwise it's silent. Can hear your intake. lol. But weighs like 50lbs. Going from Bosal to RB was tough cause I'm weight conscious.
Custom systems will be mild steel for the most part and usually have more welds involved. If you don't have a good welder it may not be a pretty site from underneath. But functional, with a good muffler should cost around $250.00 to $350.00 depending on material of piping.
HKS is rear section only. Haven't seen the Greddy. We are a dealer for SR motorsports and the exhaust seems over priced to me. IMO of course.
JIC is damn incredible, complete stainless steel extremely lightweight with a resonator. About 18lbs. The lightest of the bunch. Is a straight through design but still isn't loud at all. It's got the best sound of the bunch which is actually very typical of their exhausts. I have yet to find a better sound in any application. And we've done a lot. I shouldn't have been surprised. Single piece, muffler to catback. Minimized number of welds. Bends are beautiful. Retails for $680.00. Club pricing is about $620.00 shipped in continental US. If you're willing to pay more, but with this disount, then JIC will be a choice you will not regret. It is imported from Japan in is much better quality and appearance than the greddy and HKS systems out for this car. Guaranteed.
Check it out:
http://groups.msn.com/AutomotiveRD/picsyourequested.msnw?action=ShowPhoto&PhotoID=751
http://groups.msn.com/AutomotiveRD/picsyourequested.msnw?action=ShowPhoto&PhotoID=752
http://groups.msn.com/AutomotiveRD/picsyourequested.msnw?action=ShowPhoto&PhotoID=753
Later, rishie