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Message: <blockquote data-quote="Dalamar" data-source="post: 10358" data-attributes="member: 8116">approx. yes.NA, the longtubes won't give you a big power gain. Under boost (moving alot more air) you'll get more.Like on an 03 cobra, long tubes get around 30 HP, but NA, 281 it's around 10 HP.The stock POS looking manifold actually flows OK. KB tested it out and don't recommend replacing it.The backpressure poping drives me kinda crazy.The gain is more sound and smoothness. They are nice, but kinda spendy. If you're main goal is power, they're a bit pricy IMO.Ground clearance can also be an issue if your car is lowered.</blockquote>