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
ndrorder wrote:
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.
Ford modular family is pretty much the exception to the regular header theory. The stock manifolds are so restrictive, any header will add more power across the range, except the stock tuning limits fuel delivery, so you won't see the upper end gains without a tune.
