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Old June 17th, 2007, 09:33 PM
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Anthony Leung
1995 D90SW #51
Join Date: Oct 2006
Location: San Diego , CA
Posts: 55
4.6 swap

Does anyone know who caries after market 4.6 headers which will fit a NAS defender ? I am in the mist of an engine swap and came to the horrible relization that the 4.6 headers do not fit. I think RPI might carry some across the pond but looking at other possible options. -

1995 D90sw #51 (Converted to ST)
1997 D90ST
2006 LR3 HSE (untouched... for now)
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Old June 18th, 2007, 08:59 AM
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J. Michael McCaig
D90 ST, LR110, Series IIa, RRC
Join Date: Oct 2003
Location: VA
Posts: 470
Hedman made headers for the V8 that may work but I don't have any experiance with them. The stock 3.9 manifolds flow reasonably well so don't be afraid to use those until you go with something else. I'm using the stock 3.9 manifolds on my 4.6 and from the Y pipe back I increased the diameter of the exhaust pipe and it does fine. I was looking for low-end torque and the headers don't help much until you get the RPMs up anyway.
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