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91LX2Bfast · 09-09-2002, 08:22 AM

Your not going to add 30hp with an H-pipe and catback, but you can release up to 15hp with those mods.
Cost is hard to say because there are $150 aluminaized offroad H-pipes, and $500 SS X-pipes with cats. It all depends what you want. And catbacks usually range from $300-600, again, depending on what you want.

Toppchef - LS1 SS's usually dyno between 290-300 rwhp, stock. And I have heard of a few cars going over the 300rwhp, so the 330hp rating may be even a bit conservative.
The only GT that sucks up 18% through the driveline is going to be an auto. Manuals are closer to 12-15%.

09-09-2002, 08:22 AM	#17
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	Your not going to add 30hp with an H-pipe and catback, but you can release up to 15hp with those mods. Cost is hard to say because there are $150 aluminaized offroad H-pipes, and $500 SS X-pipes with cats. It all depends what you want. And catbacks usually range from $300-600, again, depending on what you want. Toppchef - LS1 SS's usually dyno between 290-300 rwhp, stock. And I have heard of a few cars going over the 300rwhp, so the 330hp rating may be even a bit conservative. The only GT that sucks up 18% through the driveline is going to be an auto. Manuals are closer to 12-15%. __________________ '97 T-bird LX 4.6L 2V, auto SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more No times yet