Porsche 977 Carrera S

Pros
- 3.8-liter flat-six delivers fat torque curve at the low end, while being free revving at the high endSmooth as glass, well balanced and refined feel for comfortable cruising, yet urgent enough when driven in anger
- It's a 911, with proper headlights-what else needs to be said?

Cons
- Porsche seems to be leaving vast amounts of power untapped-if that's a con
- High price
- Muted exhaust just doesn't do the car justice

Notes
- Tested on Texaco 91-octane fuel. Tested at GTPro in Fullerton California. Ambient air temperature was between 68 and 74 degrees F during testing

Stock Vs Cargraphic Exhaust
Stock
296.57 WHP @ 6700
251.54 LB-FT @ 4750

Exhaust
315.10 WHP @ 6630
256.94 LB-FT @ 4780

IPD Intake Plenum
Gains
Peak wheel-hp: 11
Peak wheel-torque (lb-ft): 14

Pros
Nice gains across the board
Quick and easy install
Easily reversible for warranty work

Cons
Someone didn't think of this earlier

Parts
Plenum and hardware
Price: $995

Cargraphic Complete Exhaust
Gains
Peak wheel-hp: 18
Peak wheel-torque (lb-ft): 5

Pros
- Big power gains at the high end
- Great sound
- Nice build quality and factory-like fit

Cons
- Some dealers may not condone your power addiction
- Exhaust screams: "Look over here!" (pro or con)

Parts
Stainless steel headers (x2)
200-cell catalytic converters (x2)
Stainless steel mufflers (x2)
All hardware and brackets necessary for install
Installation time: 2 hours

Price:
Mufflers $1,995
200 Cell Cats $2,995
Headers $1,795

Cargraphic Exhaust + Ipd Intake Plenum Exhaust
315.10 WHP @ 6630
256.94 LB-FT @4780

Exhaust & Plenum
326.49 WHP @ 6500
271.21 LB-FT @ 5870