[barrylnv]

DT shorties look great, and I have them, just don't expect any big numbers on them. I just posted my test results in the other shorty forum. Long story short, 18 RWHP gain on same dyno with 93 octane and DT shorties (claimed 18), Hennessey CAI (claimed 14), Borla S-type cat-back (heard somewhere Borla claims about 20 RWHP - pipe dream), and no tune. With tune on shorty/CAI/cat-back configuration, estimating maybe 22-23 RWHP. You can't add up all the gains linearly, doesn't work that way. Shorties with tune, possibly worth 18 RWHP, but not just shorties. Manufacturers don't like to tell you about the tune they do and/or do things like cherry-picked corrections, no smoothing, etc. Lots and lots of bad data out there.