Shorty headers
Signature TV has been diagnosed with broken bolts and cracked exhaust manifolds. It doesn't seem to have any effect right now but I will eventually have to deal with it. Truck currently has 3" CAT bac...
Forum Discussion
I have a Mustang with JBA shorties. They have equal length runners (tuned) and CARB approved. My experience and recollection are contrary to many of the comments above. Being shorties, they do their magic in the low to mid range without altering the top. The torque improvement was slight based on seat of the pants only. Throttle response was also noticeably improved. I went with ceramic coating to pull the heat away from the heads.
I don't know what, if any, benefit shorties will have for towing. There is internet talk in the chevy truck forums regarding exhaust bolts breaking on the 6.0L engines. I was interested as that is what is in my RV. While no one has nailed down a cause, it seemed that for many, the problem is recurring until the manifolds are replaced. On that observation, I've decided that if it is ever needed, I would replace the manifolds with JBA's. I don't thing they will hurt performance and there may be some benefit. As opposed to trying to find replacement stock manifolds that may be bolt snappers as well.
YMMV,
Cliff
BTW, dyno runs with shorties vs stock vs long tubes are difficult to interpret. On the dyno, the vehicle is usually in a gear too high for the shorties to shine in hopes to get that all important peak torque and horsepower.
I don't know what, if any, benefit shorties will have for towing. There is internet talk in the chevy truck forums regarding exhaust bolts breaking on the 6.0L engines. I was interested as that is what is in my RV. While no one has nailed down a cause, it seemed that for many, the problem is recurring until the manifolds are replaced. On that observation, I've decided that if it is ever needed, I would replace the manifolds with JBA's. I don't thing they will hurt performance and there may be some benefit. As opposed to trying to find replacement stock manifolds that may be bolt snappers as well.
YMMV,
Cliff
BTW, dyno runs with shorties vs stock vs long tubes are difficult to interpret. On the dyno, the vehicle is usually in a gear too high for the shorties to shine in hopes to get that all important peak torque and horsepower.
