Do I need new headers?

Lannoir

New Member
Mar 31, 2020
2
0
1
18
Cumming
Hey guys so I have a 2002 v6 automatic, and I have a problem. Because of a problem with my cats getting clogged I need a new exhaust, but I need to know like in the next 24 hours: can I bolt 2.5” Mac off road h pipe to the stock headers on my v6? Because I’m out a car and a way to work until I get this fixed, so I need answers ASAP please. And I can’t afford new headers so that’s out of the question...????? Please help someone
 
  • Sponsors(?)


08GT500

Active Member
Jul 12, 2018
715
100
53
Massachusetts
Hi,
Happy to help, need more information.
1) Are you running the vehicle’s stock exhaust Manifolds, or aftermarket shorty, or long-tubular Headers (if so, by what MFG?).
2) Was the MAC catless H pipe you bought intended for usage with stock exhaust manifolds, or long tubular headers(Part #?).
3) Car has/has the stock Y exhaust system, or has been modified to run dual exhaust, front to back?

-Usually, shorty headers, like stock manifolds, bolt up to a stock-type exhaust system (ball & socket (2) bolt flange design w/downpipes) without modification.
- Long tube headers will not bolt up to the vehicle’s stock exhaust systems without pipe length modification in addition to adding (3) bolt header collector flanges.
Either are easily converted in a pinch with an angle grinder, MIG welder, few pieces of pipe, and/or collectors.
Best!
-John
 

Lannoir

New Member
Mar 31, 2020
2
0
1
18
Cumming
Hi,
Happy to help, need more information.
1) Are you running the vehicle’s stock exhaust Manifolds, or aftermarket shorty, or long-tubular Headers (if so, by what MFG?).
2) Was the MAC catless H pipe you bought intended for usage with stock exhaust manifolds, or long tubular headers(Part #?).
3) Car has/has the stock Y exhaust system, or has been modified to run dual exhaust, front to back?

-Usually, shorty headers, like stock manifolds, bolt up to a stock-type exhaust system (ball & socket (2) bolt flange design w/downpipes) without modification.
- Long tube headers will not bolt up to the vehicle’s stock exhaust systems without pipe length modification in addition to adding (3) bolt header collector flanges.
Either are easily converted in a pinch with an angle grinder, MIG welder, few pieces of pipe, and/or collectors.
Best!
-John
I still have the stock manifolds on her, and she still has the stock y pipe. The h pipe I bought said it works with aftermarket shorty headers or the stock manifolds, but I wanted to make sure because the shorty headers it said it worked with were 2.5” but the stock pipe is 2.25” so I assumed that the stock manifolds came out to 2.25 collectors, which is what has been tripping up my brain. Just wanted to make sure she won’t need much modification. Also I now have a second question... because of legal reasons, I have decided to fab in two slp high flow cats into the h pipe. Will a v6 with true duals, slp high flow cats on an h pipe, and flowmaster super tens still be really, really shockingly loud? Because I know it would be if it was catless but I wanted to make sure I won’t lose too much volume with the high flow cats, because I really want her to be attention-grabbing....? Thank you for all your help bro.
 

kiddiccarus

The first widely accepted Tranny
15 Year Member
Dec 24, 2003
1,039
520
133
30 Mins from a Ragged GT
www.angelfire.com
Look at my build thread. I have installed:

Shorty Headers
Custom X Pipe
440 Flowmaster American Thunder (V8 Version) Dual 2.5 inch

This is on my Convertible and is TOO loud for what I intended, but its on there so It will remain

 

08GT500

Active Member
Jul 12, 2018
715
100
53
Massachusetts
Hi,
IMO, Best thing to do is pick up the phone & call the Mfg.& ask if uncertainty abounds in the future vs.stressing over it.
Cat’s, smart move! SLP Cat’s won’t quite have the effect that OE Cat’s did on sound suppression, should give a deeper note & they’ll still hear you coming.
Most importantly, you’ll be legal & not spewing Nox, CO, and HCs everywhere.
Good luck!
-John
 
  • Like
Reactions: Lannoir
Thread starter Similar threads Forum Replies Date
D 2006 Ford Mustang Running Lean and Rich Problem (Need Advice) 2005 - 2014 S-197 Mustang -General/Talk- 0
9 Need Help on what I need - New to the game 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
V Need help with choosing headers 1965 - 1973 Classic Mustangs -General/Talk- 4
V Need help for headers 1965 - 1973 Classic Mustangs -General/Talk- 0
D Need Help Headers 351w 1965 - 1973 Classic Mustangs -General/Talk- 1
J New Here! Longtube Header Help SN95 V6 Mustang Tech 0
A Exhaust Hello Everyone, I Need Help With My Clutch Replacement. SN95 4.6L Mustang Tech 1
H I Need Input On Long Tube Headers For My '89 5.0 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 25
bigvino Need Help To I.d. These Headers. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 23
J 68 Coupe 302 Need Header Ideas Classic Mustang Specific Tech 11
N 408 Need Long tube header, 3 inch exhaust help 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 17
Slo5Oh89 Looking to install Long Tube Headers. Need advice on install and if its as hard as it sounds. Fox 5.0 Mustang Tech 10
R Header install. Need advice. 2010 - 2014 Specific Tech 7
5.0_GT_kid Troubleshooting help needed. 89 LX won't run, driver side headers cold. Fox 5.0 Mustang Tech 5
G What is needed for header swap? SN95 4.6L Mustang Tech 8
N Need help with finding correct headers Classic Mustang Specific Tech 10
F Need Headers for My '65 - Any Comments on Thermal Tech Coatings Classic Mustang Specific Tech 3
LarsD Need to plug a port on my headers, anybody know what size the port is? SN95 4.6L Mustang Tech 0
S need some header suggestions 1965 - 1973 Classic Mustangs -General/Talk- 9
N Need Header Advice Fox 5.0 Mustang Tech 2
bdog9seclx Need headers for a 2000 body with 302 in it 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 8
L NEED ARP TQ SPECS for HEADERS PLEASEEEEEEE Fox 5.0 Mustang Tech 6
S Adding headers soon and need ideas Classic Mustang Specific Tech 9
U need some header advice SN95 4.6L Mustang Tech 3
3 i need headers, please help!!!! Classic Mustang Specific Tech 3
mustangford289 Need advice. Long tube headers no cats...but want quiet. 2005 - 2009 Specific Tech 22
JoshHooten Need help deciding headers 1994 - 1995 Specific Tech 11
M What do I need to tightenin the passenger side header/x-pipe connect SN95 4.6L Mustang Tech 8
C Need Headers for TFS R Series In a 69 Stang Classic Mustang Specific Tech 1
Night Shifter need advice on which header gasket to get 1996 - 2004 SN95 Mustang -General/Talk- 3
Adam95GT Questions about swap. (headers/engine bay)(RC your help is needed) 1994 - 1995 Specific Tech 6
stang1986GT Really need help here...BBK header collector stud nut Fox 5.0 Mustang Tech 4
9 Which type/size headers do I need? Fox 5.0 Mustang Tech 23
stang1986GT Need help with BBK shorty header stud nuts Fox 5.0 Mustang Tech 4
M I need header help Classic Mustang Specific Tech 4
jeimen Bassani Header Instructions Needed! Fox 5.0 Mustang Tech 1
B 05-08 Mustang V8 needed for R&D w/ JBA HEADERS in San Diego Regional Forums and Event Information 0
D Need Opinion on Headers? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 9
C what kind of swivel do i need to unbolt passenger header from stock h-pipe? SN95 4.6L Mustang Tech 2
SDaygo Mach 1 Need Help w/ NEW JBA Headers Catalog!!! 1965 - 1973 Classic Mustangs -General/Talk- 1
5.0 LX Sleeper Need Full Length Headers, HELP!! Fox 5.0 Mustang Tech 2
vicma762004 need to know if my stock header bolts will fit my new headers? 1994 - 1995 Specific Tech 7
Kdubslugga Im using SN95 Longtube headers, do I need an SN95 H pipe as well? Fox 5.0 Mustang Tech 8
Kdubslugga Need help, will 94-95 Mustang full length headers fit my 88 GT? Fox 5.0 Mustang Tech 2
laserstang21 headers? need info 1996 - 2004 SN95 Mustang -General/Talk- 2
MyBloodRunsBlue Ordering BBK L/T headers...Need Opinions 1996 - 2004 SN95 Mustang -General/Talk- 9
S Can anyone help me find a part number need midpipe to header nut that threads on stud 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 9
M Long Tube headers! I have shorties? Should i buy them? NEED HELP QUICK! Fox 5.0 Mustang Tech 5
T 68 289 header problems..need your help.. Classic Mustang Specific Tech 3
U need help with choosing headers SN95 4.6L Mustang Tech 4
Similar threads