|
You should think about keeping the header.
My friend replace the cracked factory exhaust manifold ($250-$450 replacement costs) with a pacesetter 4 into 1 long tube set ($135) on his 4-cylinder toyota truck and saw no negitive impact on fuel economy.
I don't think keeping the header will hurt your fuel economy as much as switching it back to factory specs will hurt your wallet.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|