Headers that don't suck?

anthrax323

NAXJA Forum User

Location

San Antonio, TX

• May 2, 2016

• #1

So I finally decided to start tracking down an exhaust leak that started within about a thousand miles of installing a set of APNs, and whaddya know... Cracked to s*** at the lower Y.

Are there any decent headers out there that won't break the bank? We'll call it a federal emissions 2000 XJ.

 

D

DaKing

NAXJA Forum User

Location

El Paso

• May 2, 2016

• #2

Add a flex pipe



side exit

 

anthrax323

NAXJA Forum User

Location

San Antonio, TX

• May 2, 2016

• #3

Yeah, I've considered it and may ultimately have to go that route. I'll go ahead and take care of my motor mounts as well despite the fact that they look perfect.

But in addition to the flex pipe... Any header reccomendations?

 

RoyalXJ

NAXJA Forum User

Location

West Deptford, NJ

• May 2, 2016

• #4

You can run a cheap header with a flex pipe. The most expensive headers will crack as well. My Banks header cracked.

 

G

garr

NAXJA Forum User

Location

Nassau County NY

• May 2, 2016

• #5

Will the split headers that Chrysler switched to on late model 4.0's work on earlier models? Or be retrofitted in?
Seems like the split headers solved the cracking problem as I never hear of anyone having problems with them like the earlier models.

 

B

bigdaddyjlove

NAXJA Forum User

Location

Atalanta

• May 3, 2016

• #6

they fit, but I hate them. NO room around them for getting to manifold bolts.

 

lazyxj

NAXJA Member #1310

Location

Los Angeles

• May 3, 2016

• #7

garr said:

Will the split headers that Chrysler switched to on late model 4.0's work on earlier models? Or be retrofitted in?
Seems like the split headers solved the cracking problem as I never hear of anyone having problems with them like the earlier models.

Click to expand...

The 2000-2001 split headers are made to fit the 0331 head. The 0331 has smaller exhaust ports and the split header will not completely cover the older head's larger exhaust ports.
A flex pipe, on the section of exhaust pipe where it crosses under the transmission, is the common fix.

 

anthrax323

NAXJA Forum User

Location

San Antonio, TX

• May 4, 2016

• #8

So to clarify: 99-down headers *will* correctly fit the exhaust ports on the 0331 head? If so, should I be using an OEM 2000-2001 gasket?

Currently, it has a 2000-2001 OEM gasket, and APN headers for the 99-down models.

If something in this combination is totally wrong, that could explain the remaining leak(s).