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Porsche 991 GT3 with Evolution MotorSports Exhaust and Headers EVOMS.com

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Published on Mar 20, 2015

Evolution MotorSports attacks the Porsche 991 GT3 with a vengeance and designs a sport exhaust and header system that not only adds significant power and torque, it saves weight and gives this new generation 991 GT3 the growl it’s worthy of.

EVOMS ClubSport Exhaust Features:
- Designed and fabricated by skilled craftsman with over 40 combined years producing Porsche exhausts
- Manufactured in Arizona using the highest quality certified USA stainless steel
- Incorporates 70mm German-made exhaust bypass valves and retains OEM sport exhaust sound feature
- More aggressive “on-demand” sport sound - exhaust sound changes with the OEM sport exhaust button
- Non-Sport Exhaust Mode = minimal additional interior noise for highway or daily driving
- Sport Exhaust Mode = intoxicating exhaust notes singing to 9000 RPMS
- Increases HP and TQ – On average ~7 HP and 9 ft./lbs. TQ gained throughout the power range
- Saves 33 pounds verses the stock exhaust system - Replaces both side and rear mufflers
- 50 state / SMOG emissions legal
- 100% Bolt on – no modifications. Easy 45 minute installation
- Works with OEM headers or EVOMS ClubSport headers with high flow catalysts
- 16 gauge T-304 stainless steel – mandrel bent and purge welded exhaust tubes
- 16 gauge T-304 stainless steel muffler body with proprietary chambered design for a “drone free” sound


EVOMS ClubSport Header Features:
- Designed and fabricated by skilled craftsman with over 40 combined years producing Porsche exhausts
- Manufactured in Arizona using the highest quality certified USA stainless steel
- Incorporates 130mm German-made 200 CPI HJS High Flow Catalysts
- Equal Length, mandrel bent primary exhaust tubes – all argon purge welded
- Increases HP and TQ – On average ~11 HP and 13 ft./lbs. TQ gained throughout the power range
- 100% Bolt on – no modifications. Easy 45 minute installation
- Works with OEM Exhaust or EVOMS ClubSport Exhaust System

Exhaust Weights:
EVOMS Bypass Valve 991 GT3 Exhaust Weight Savings verses Stock
OEM 991 GT3 Exhaust: 65 lbs. (29.48 kg)
EVOMS 991 GT3 Bypass Valve Exhaust: 33 lbs. (14.96 kg)
EVOMS Weight Savings of 32 lbs. (14.51 kg) / 49% lighter than Stock
Power Gains EVOMS Bypass Valve 991 GT3 Exhaust:
Below 6000 RPMS: ~9 HP and ~12 ft./lbs. TQ
Above 6000 RPMS: ~7 HP and ~8ft./lbs. TQ
Power Gains EVOMS ClubSport 991 GT3 Headers / Sport Catalysts:
Below 5500 RPMS: ~11 HP and ~13 ft./lbs. TQ
Above 6000 RPMS: ~7 HP and ~6 ft./lbs. TQ
Power Gains EVOMS Bypass Valve Exhaust & ClubSport 991 GT3 Headers / Sport Catalysts:
Below 5500 RPMS: ~20 HP and ~25 ft./lbs. TQ
Above 6000 RPMS: ~14 HP and ~14 ft./lbs. TQ

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