Down pipes will provide a serious gain, intake is a wash, before heat soak it will help and be near neutral once heat soaked. The extra turbo noise is nice though. Much has changed in the jb4 world, a much smoother product not that it will be as smooth as giac, but you wouldn't need to think in terms of stages, you could get your downpipes, leave it on an auto tune map or log it and send to terry for custom, either way you'd get the gains of a new tune; only hear great things about giac though. No one will ever see your dp's so consider the bms dp's, probably all the performance and half the price of a used ar or akra setup.
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BSM 1M, MCS Coilovers, Pure Stg 2 Turbos, Walbro LPFP, JB4, BMS E85 Flash, ECS CF sealed intake, N54 Tuning DP's, Evolve Race Exhaust, Wagner FMIC, Stett CP w/ Tial BOV, ST BBK, Big Tires.
M6 6MT Gran Coupe w JB4, 718 GTS, Lotus Esprit V8TT, Duc 998SBayliss
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