4-2-1 Header Install
10-31-2001, 12:05 AM
#1
Member
Thread Starter
Join Date: Jul 2001
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
4-2-1 Header Install
Hey all, I'm about to buy a 4-2-1 header for my 98 tiburon, and was wondering, just how difficult it was. Is there any special tricks or tools needed for the install? Any advice will help, thanks
10-31-2001, 04:20 AM
#3
Senior Member
Join Date: May 2001
Posts: 698
Likes: 0
Received 0 Likes
on
0 Posts
a few tips,
1. make sure you do a custom exhaust with it
2. put a new cat in and make sure the rear o2 sensor goes behind the cat.
3. DO NOT GET A LOUD MUFFLER headders are real loud on their own, so a loud muffler is not a good idea.
1. make sure you do a custom exhaust with it
2. put a new cat in and make sure the rear o2 sensor goes behind the cat.
3. DO NOT GET A LOUD MUFFLER headders are real loud on their own, so a loud muffler is not a good idea.
10-31-2001, 05:00 AM
#5
Senior Member
Join Date: May 2001
Location: Texas
Posts: 669
Likes: 0
Received 0 Likes
on
0 Posts
Vehicle: Custom Wagon
I have a HKS dragger muffler on my car with 2 1/4" cat back and it's not loud at all. Sounds just right and it's made for our cars too. Just my .02.
10-31-2001, 12:06 PM
#8
Senior Member
Join Date: May 2001
Posts: 2,804
Likes: 0
Received 0 Likes
on
0 Posts
Wonder how 4-2-1 will sound with new cat-back along with my CAI and SOON to order BBTB/BIM (from Onpol).....speaking of Onpol..whats the email addy again? I need to introduce my self to him/her/the company. and to get info on cost/shipping/HOW FAST IT CAN GET HERE. 
)
)
11-01-2001, 02:14 AM
#9
Senior Member
Join Date: May 2001
Posts: 585
Likes: 0
Received 0 Likes
on
0 Posts
Vehicle: Mitsubishi Lancer Ralliart GSR
You will need to extend/replace the stock O2 sensor as the bung for it is located further down on the 421 header, on the stock one it is near the first cat.
Some tibs require 2 O2 sensors, you will need to ask around - my UK spec tib only needed the one.
In the picture below you can see the bung for the O2 sensor, just after the flex-pipe.
Some tibs require 2 O2 sensors, you will need to ask around - my UK spec tib only needed the one.
In the picture below you can see the bung for the O2 sensor, just after the flex-pipe.
