I saw info on a ZL7 package. I can't find anyone selling it, but you can buy these items separately. Does it really give you 77 HP improvement and those 1.85 rockers, do they cause any damage long term? Here are the items listed:This ZL7 PerformancePac™ contains the following items:
* Blackwing™ Induction System (21110)
* C5 Smooth Bellows (23066)
* PowerFlo™ Exhaust System (31048)
* 85mm High-Flow MAF Sensor (23060)
* MAF-Sensor Bellows Kit (23061)
* DiabloSport II Programmer with SLP Custom Tuning (27002T)
* 1.85-Ratio Rocker Arms (50185)
* Tuned-Length Long-Tube Headers (30060)
* Header-Installation Kit (30062)
* High-Flow Catalytic Converters (30063)
* H-Pipe/Balance-Tube Assembly (30065)
* H-Downpipe (30067)
* ZL7 Fender Badges (pair)
* Blackwing™ Induction System (21110)
* C5 Smooth Bellows (23066)
* PowerFlo™ Exhaust System (31048)
* 85mm High-Flow MAF Sensor (23060)
* MAF-Sensor Bellows Kit (23061)
* DiabloSport II Programmer with SLP Custom Tuning (27002T)
* 1.85-Ratio Rocker Arms (50185)
* Tuned-Length Long-Tube Headers (30060)
* Header-Installation Kit (30062)
* High-Flow Catalytic Converters (30063)
* H-Pipe/Balance-Tube Assembly (30065)
* H-Downpipe (30067)
* ZL7 Fender Badges (pair)