[HIJACKER]

Please sticky....


Fed Spec
Fed Specs only affect 2000 and some 2001 models, Manufactured from August 1999 to late October of 2000, these GTs came with 205 hp and 205 ft·lbf. The Fed Spec GT is most recognizable for having one catalytic converter (cat) and two O2 sensors, with one sensor before the cat and the other after.

Cali Spec
Cali Specs in 2000 were primarily shipped to California because of the more stringent emission laws; although other areas of North America received them as well. The Eclipse GT line was switched over for cost reasons to the Cali Spec, so only one version of the GT would be manufactured. Cali Specs came with 5 hp less and 5 ft·lbf less. Cali Spec emissions control are three catalytic converters and four O2 sensors. After each exhaust header is a sensor followed by a pre-cat then the main cat after y-pipe then two more O2 Sensors.

Advantage/Disadvantage
1: The most notable advantage for the Fed Spec is with power gains with aftermarket accessories, i.e. exhaust headers, air intakes, cat-back exhaust systems, and moderate forced induction applications.

2: Whereas the Cali Spec has the aftermarket dominated, with five years in production it would make since to make products for Cali Spec, being the dominant trim. A good example would be headers, for those with Fed Spec you will find yourself adding 6-10 inches to a cat-back and plugging two O2 sensor bung holes to fit.

Note: The GTS is Cali Spec, the power increase is from raising the compression from 9.0:1 to 10.0:1 and adding equal length runners with butterfly valves. Forced induction applications with stock short block over 5-6 psi have proven engine failure.