I have heard the cheapy chrome ones will definitely warp and leak. If you find a nice thick aluminum one let me know because I'd like to buy one. I run a replacement cast iron one on my aluminum Edelbrock LD340 intake. Its nice and thick; not a cheap part, but it takes special attention to get it 100% leak free because its cast iron on aluminum and they expand at different rates. Especially around that area of the engine. To get mine to seal I have to wipe the surfaces down with Brake Parts Cleaner and clean paper towels, let dry, than apply a thin film of sealer on both sides of gasket, let that set for 15 minutes, assemble and let sit over night. Then its 100% leak free. If I was casual about it I would end up with a very slight seep when the engine cools down which kind of gets annoying after a while; especially with fresh paint on the engine.
