power gains?

  1. #1
    what am i likely to gain if anything by putting a 4-1 or 4-2-1 manifold, along with a decat pipe and a racing centre tube (no middle box) on my 98 vtr?

    5bhp+ or just a heap of noise??
  2. #2
    you will get a little gain

    you will get a bit of noise to