Removing the cat
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
500, 472, 425, 368 Discussion, Removing the cat in Cadillac Engine Technical Discussion; I've been looking into 425 cars lately, I like the DeVilles alot from this era. I read the whole "cheap ...
  1. #1
    90Brougham350's Avatar
    90Brougham350 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
    Join Date
    Jan 2005
    Location
    River Falls, WI
    Age
    29
    Posts
    3,730

    Removing the cat

    I've been looking into 425 cars lately, I like the DeVilles alot from this era. I read the whole "cheap 425 power upgrades" thread, but didn't get a great answer on just how much power removing the cat from a 425 car frees up. It seems like the 472/500 manifold and removing the cat are the two biggies as far as cheap upgrades, am I correct? What is a stock 425 rated at, HP and torque?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Location
    Albuquerque, NM
    Age
    26
    Posts
    7,971

    Re: Removing the cat

    Stock 425 4bbl is rated at 180hp/320ft.lbs. A center-cut 472/500 intake manifold might be worth anywhere from 10-20ish. Gutting the cat I'd say would be worth similar gains or better. Doing a nice true dual system would be the best of course.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting