oh that heat sheild... i dunno the ones on our cars always fall off... same with the cat heat shield...
the one in my chevette is still intact and ive noticed in the dead of winter it makes a noticeable difference if i have the tube on it or not. BUT it is carbed and manual choked so i dunno if the obd1 &2 computers can handle the difference or it it goes into some goofy mode...
more for cat light-off time and reduced under-hood temps than anything.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
Ask your race car friends and they will probably tell you you want to keep the exhaust as hot as possible so the gasses move out faster.
Remember that some of those shields protect stuff down there.
I use and talk about, but don't sell Amsoil.
Who is shatto?
06 4.7 Tundra replaced a 98 Dakota 3.9.
623,000 miles on original engine and transmission, using Amsoil by-pass filters and lubrication.
+Everybody knows something you don't know.
+Artists prove truth can be in forms you don't understand.
Low-Risk Option Trader
Retired Pro-Hunter featured in; 'African Hunter', by James R. Mellon III. and listed in; Rowland Ward's Records of Big Game.