Quote:
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Originally Posted by Black XR
Originally Posted by JC
4499s are better for stockish I6s, 4480s for cammed/chipped I6s. The 4480s work better mid-high rev range, the 4499s are more low to mid
seems to be a difference of opinion here on witch will give you low to mid & mid to high I tend to think JC is right but I'm happy for somebody who KNOWS to tell me otherwise
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Specs from Pacemaker site (
www.pacemaker.com.au)
PH 4499
FALCON | EA-EB-ED-EF-EL-AU | XG-XH-AU UTES
FAIRLANE | NA-NC-NF-NL
3.9-4.0 LITRE | Manual & Automatic | TRI-Y Design
P/Steering: Yes
Gasket: DSF 61
Air Con: Yes
Primary Pipe: 1 ⅝" (41mm)
Oxy Sen: Yes
Secondary Pipe: 1 ⅞" (48mm)
E.G.R: N/A
Outlet (flanged): 2 ½" (63mm)
Y Branch: N/A
Fitting Time: 1 ½ Hrs
Note: Will fit AU column change auto.
PH 4480 - COMPETITION HEADER
FALCON | EA-EB-ED-EF-EL-AU | XH-AU UTES
FAIRLANE | NA-NC-NF-NL
3.9-4.0 LITRE | Manual & Automatic | TRI-Y Design
P/Steering: Yes
Gasket: DSF 61
Air Con: Yes
Primary Pipe: 1 ⅝" (41mm)
Oxy Sen: Yes
Secondary Pipe: 1 ¾" (44mm)
E.G.R: N/A
Outlet (flanged): 2 ½" (63mm)
Y Branch: N/A
Fitting Time: 1 ½ Hrs
Note: Will not fit with Factory LPG. Refer PH4499.
Will not fit XG ute.
It looks like the design of the 4480s has changed somewhat - they used to use a larger primary, so given the smaller secondary of the 4480s, these may in fact produce better torque down low, which means Krissy is correct.