Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Cat back or turbo back?

  
  1. #1
    Status
    Offline
    Matt_GSi's Avatar
    AOC Obsessed
    Join Date
    Jun 2008
    Posts
    1,228
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    Cat back or turbo back?

    Just wondering if there is much difference in performance between the 2. is it worth paying for the full turbo back milltec system or cat back system with a precat

    any help appreciated

  2. #2
    Status
    Offline
    buckle's Avatar
    /
    Join Date
    Sep 2004
    Posts
    18,921
    Mentioned in
    0 Post(s)
    Quoted
    1 Post(s)
    Precat will give the biggest gains, followed by sports cat, then the cat back will give the least gain

  3. #3
    Status
    Offline
    Turbo_Scott's Avatar
    AOC Obsessed
    Join Date
    Oct 2004
    Posts
    11,474
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    You wont notice the gains by driving the car "normally" but you will see gains on the RR, however it wont be +10bhp for the pre-cat, +5bhp for the sports-cat & +3bhp for the cat-back ... more like 7bhp for the lot.

    Turbo back should be bought if you are going to remap the car.
    Fastest, Most Powerful & Only Mag Featured Astra In The AOC Cumbrian Region

  4. #4
    Status
    Offline
    GB's Avatar
    AOC Obsessed
    Join Date
    Jan 2006
    Location
    Leeds
    Posts
    21,918
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    I say get the full turbo back if u can afford it

    i cant comment on the above about it only giving about 7bhp for the entire lot - all i know is mine has the full turbo back and coupled with a few other bits its kicking out almost 40bhp over what it was when standard

    im still on the standard map and you can definitely feel the difference

    entirely upto you though and the budget

    a lot of ppl just start with a precat (obligatory in my opinion) and a cat back - then either leave the standard cat in place or when funds allow upgrade to a sports cat - seeing as the sports cat comes in at about 350 its quite pricey to do the whole lot at once.

  5. #5
    Status
    Offline
    mania's Avatar
    AOC Fanatic
    Join Date
    Sep 2008
    Posts
    437
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

  6. #6
    Status
    Offline
    Gnasher's Avatar
    AOC Obsessed
    Join Date
    Oct 2005
    Posts
    1,897
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Cat back will give you next to chuff all except a more sporty exhaust note.

    Turbo back is probably worth approx 15BHP over and above a cat back.

    If you are planning on more tuning later go for the turbo back one.
    2006 Astra VXR on 19's in Arden Blue
    ExhaustsUK Catback, Eibach Sportlines, DS Ultima, Roose hose kit, Forge recirculating dump valve, Full self modded SMD conversion

  7. #7
    Status
    Offline
    deviousD's Avatar
    AOC Newbie
    Join Date
    Jun 2008
    Posts
    8
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    i have just recently bought a zaffie gsi an was going to buy the miltek exust offa fleabay 700 odd notes an u get a front cat pipe thing free is this going to inprove on bhp or just a sporty note from exsut???
    many thanx
    D

  8. #8
    Status
    Offline
    GB's Avatar
    AOC Obsessed
    Join Date
    Jan 2006
    Location
    Leeds
    Posts
    21,918
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    The precat which they're including is the part every owner should replace in my opinion. Should release a good 10 ponies . . . Some swear my milltek . Some don't . If u get it from roadrunner via ebay they are a brilliant seller . . . . Go to a certain tuner/official stockist and i say its a bad move. . No names mentioned ;-)

  9. #9
    Status
    Offline
    kervaig's Avatar
    AOC Fanatic
    Join Date
    Aug 2005
    Posts
    398
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by GeordieBandit View Post
    The precat which they're including is the part every owner should replace in my opinion. Should release a good 10 ponies . . .
    Is the design of the original that bad?

  10. #10
    Status
    Offline
    GB's Avatar
    AOC Obsessed
    Join Date
    Jan 2006
    Location
    Leeds
    Posts
    21,918
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    well the original is restrictive in that its a catalytic convertor (dont worry its not MOT tested) and the one we encourage owners to fit is just a lenghth of pipe with a lambda boss in. So exhaust gases pass straight through

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •