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The OEM Cats restrict exhaust CFM flow
it's pumping a lot of exhaust
The Stage 1+ Power Pack includes: COBB Accessport - The most complete Subaru tuning solution on the planet
// SOUND TUNING
ETS Intercooler Upgrade - Saab 900 / 9-3 1994-2002 Twin Scroll The OEM Cats restrict exhaustThe ETS Saab 9 3 intercooler unit features smooth flowing end tanks and a highly efficient bar and plate core. The core is 100% vacuum brazed, and features louvered external fins, and a very fine internal fin pack. To attain the maximum efficiency possible, the internal fins are offset and staggered to get every possible air molecule to "scrub" up against an internal fin so that the heat may be transferred to the external fins and carried away from
