matt_lamb_160 252 Posted September 8, 2019 Agree totally with dean. Adding headers to this car will be a waste of time and money. It you are worried about originality, it is ruined as soon as the bonnet opens to. I suggest leave it as is or do a muffler swap only. The headers will make almost zero difference to your power. The exhaust manifolds are not what limit these engines in stock configuration. 1 gerg reacted to this Share this post Link to post Share on other sites
FORD_MAN 1,026 Posted September 15, 2019 My Silver XE S-pak I drove on my P's I had standard manifold, exhaust fitters used a 3" long 2" pipe from standard flange to a full 2.5" exhaust, lost a little torque from 1000-1600 but after that it picked up. & When I fitted Pacemaker extractors & 100 cell cat to my XF ute (already had 2.5" cat back & 214°.495" Cam), only really made a bit more power after 3000 rpm (till valve float ) other wise only made a little difference. Same exhaust on my built xflow sounds another thing altogether tho, I like the Hooker aerochamber muffler sounds nice on anything, 1 dex reacted to this Share this post Link to post Share on other sites