A++. They have reasonable prices and fast shipping. Just received my LT4 springs and GM Performance head bolts. www.sdparts.com

I bought a few items from them and their customer service is great. I just checked their prices and to me it seems like ALL their engines went up in price by 1000 freaking dollars!! They used to have much better prices then that.

I agree, decent prices and great customer service. I surely don't have anything bad to say about them.

i didnt think the customer service was that great, i never got emailed any shipping info, or updates other than that my order was received....

some stuff was out of stock of which i wasnt notified, the only way i got answers was to call.

i was told that my stuff was shipping twice before it finally did3-4 days later, one guy thought all i ordered was head gaskets, ( i got a vortec head and intake kit $1200 by the time it shipped).....they need to add a disclaimer that the heads are prepared to order rather than a set sitting ready to ship

when they finally did ship, i had asked who they used and was told fedex or ups whatever i preferred, said ups because they come before i go to work, and the stuff got shipped fedex. so i had to take a half day off work to receive my stuff.

maybe if you order by phone it would be better, i ordered online and felt totally left in the dark, in fact if i look my order up online it still says preparing to ship..... and the motor has been together since july 4th

Yes, they didn't give me shipping info. either. When I checked online it said "Preparing to ship" for two days. On the third day it was at my front door.