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Hey Leonardo,
the gm system is an axel back made by Borla and is in the exhaust sticky I believe. Vid has a silver car with red stripes. It sounds a bit quiet but some who have it like it alot. You have to really go back in this section and find some threads but I think there are some comments on it. As far as power KMPrenger is right about the power, as far as any dyno numbers that have come up we are getting only 3-4 peak hp but the bulk is in the 5000-6000 rpm area where our v6 has a big dip in power. From all dyno's I have seen for cai's, headers or exhaust they all seem to increase power over the curve and at the dip keeps it a smooth accending line and no dip, hence some of the big numbers you hear about.
Catbacks will give you 9 or so but teamed up with a cai or headers about 6-7.
Cai's by themselves and by JRE'S testing are 10-14 peak,I think your new ingen was at 12 per Ingen.Teamed with other mods Unknown for sure, other then Ingen long tube got about 8 with an axel back on Scrming's car.
As far as that gm intake only the tube is different then stock. One Dyno place back in VA I believe started to test v6 parts but hasn't been on here in awhile. You will have to really search but he tested a blackwing which is just a tube and claims 16 hp, but other threads one said gained nothing at all.Again search as I remember reading them but don't recall which thread had the imfo.
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