I just ordered 600 bucks worth of tires today. Summit has free shipping on orders over $99. For headers that might save you a few bucks. They also price match. Look online for the lowest advertised price.
I just ordered water injection control unit from jegs they matched an online price I found that was 35 bucks cheaper and got it three days later in Australia - very impressed will use them again
I just ordered a set of Comp. Eng. adjustable drag shocks from Summit last night.
Nobody in Oz had a full set....and it was cheaper to get them at Summit than here.