Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Exhaust question

Discussion in 'The Garage' started by Z3PR, Oct 18, 2002.

  1. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    Sometime in the near future I'll be putting a new exhaust system on the 76 K5. My plans are Headers, duel exhaust (no cats), and 40 series Flowmasters. My question is: For a fairly stock 400 sbc, should I use 2.25 or 2.5 pipes ?????? I'm concerned about back pressure, but won't be running any cats. /forums/images/graemlins/1zhelp.gif
     
  2. BowtieBlazer

    BowtieBlazer 1/2 ton status

    Joined:
    Jul 15, 2001
    Posts:
    2,462
    Likes Received:
    0
    Location:
    Baton Rouge, Louisiana
    2.25 and 2.50 aren't that big of a difference....I'd run 2.25 for the bit of extra backpressure....it wont rob horses enough to make that big of a difference with true duals and no cats
     
  3. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    So 2.25 will be okay on the back pressure with no cats and a pair of Flowmasters ??? I'm thinking of dumping it out the sides in front of the rear wheel wells. I want to use the "Meg's" (megaphone) crome exhaust tips sticking out 4 inchs from the body. It'll be angled out and back at 45 degrees.
     

Share This Page