hey, wetry. this ones for you! on 2004 Chevrolet Silverado 1500

i have pin hole in exhaust manifold, need to replace('03 f-150). should i replace with stock manifold or upgrade to header type? what's ur opinion.

by in Blaine, WA on March 17, 2013
1 answer 5 comments
ANSWER by on March 17, 2013
Cant fix stock manifold by welding or brazing? I would replace with stock as both would have to be replaced otherwise, to run right. Think they only use V engines in this one so need to use stock or both. Wish they still had the 4.9 best engine for a truck i know of, Inline = a bunch of torque! What was the last year for the 4.9, 98-99?
COMMENT by on March 18, 2013
99. a buddy had one. well with the age of the ride and the mileage i was thinking of doing both anyway. if 1 is going, the other may be just behind. this is triton v8 4.6. 300,000 kil. and still tons of torque. had to replace exhaust last fall so upgraded to true dual exhaust. found spark plug and coil boot cooked on number 6. trying to balance the burn. mechanic buddy of mine tells me that these types of trucks usually show this tendancy off the left bank. my theory is it's the exhaust set up. picked up an extra boost for torque after modification. just curious to see if you had an opinion about completing the upgrade. i worry if i do, y pipes may crack with the hot and cold. i live in northern b.c. canada.
COMMENT by on March 18, 2013
Does it still have the Y pipe? You stated true dual exhaust.
COMMENT by on March 18, 2013
no. got rid of the y pipe. figured that was part of the cooked boot problem on the left bank. just play'in a theory so both pipes are designated(way more torque on the high way). the y pipe i was referring to was a style of header i was lookin at. more of a long tube style header.
COMMENT by on March 18, 2013
Heat/cold fluctuation aint going to hurt the header!
COMMENT by on March 19, 2013
thx for your input. made up my mind for me.