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Honestly guys, I wouldn't knock Brad Roberts, many 'tuners' say they gain this and that from "feel" but you cannot feel such powers, it's incremental to what you're already used to and negligible by a 'butt dyno.' Only real way is having a dyno run before and after that intake install with same weather condition. If the intake didn't sit in the engine bay like that and actually had an element filter right at our side vent and smooth mandrel bent tubing going to the TB than maybe it'll help.
Side note: So does that X51 not bolt on to the 986's stock manifold's bolt pattern on the heads? That intake manifold looks to be a beast if you had port work done on the head for easier breathing of the engine.
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