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Fred Lee · 05-31-2013, 10:12 AM

Before you finalize your decision on the rear end please contact other Big Block Corvette racers that have successfully used an upgraded I.R.S. I have made an
Aluminum 12 bolt I.R.S. casting called the HammerHead for the 2010 Camaro that has been in several test cars with 800 plus hp. I am currently in the process of doing the same for the Challenger, Viper and C4 Corvette I.R.S.

If there is enough interest I can make a cast iron version of the 12 bolt HammerHead for the 63-79 Corvette also. NHRA will not allow an Aluminum replacement differential casting. If you are curious please visit hammerhousing.com for more info. Thank you
Fred Lee 231-740-5534 Cell phone

05-31-2013, 10:12 AM	#11
Fred Lee Junior Member Join Date: Dec 2002 Location: Muskegon,Mi Posts: 42 Likes: 0 Liked 1 Time in 1 Post	Re: Project 69 Corvette L88 Before you finalize your decision on the rear end please contact other Big Block Corvette racers that have successfully used an upgraded I.R.S. I have made an Aluminum 12 bolt I.R.S. casting called the HammerHead for the 2010 Camaro that has been in several test cars with 800 plus hp. I am currently in the process of doing the same for the Challenger, Viper and C4 Corvette I.R.S. If there is enough interest I can make a cast iron version of the 12 bolt HammerHead for the 63-79 Corvette also. NHRA will not allow an Aluminum replacement differential casting. If you are curious please visit hammerhousing.com for more info. Thank you Fred Lee 231-740-5534 Cell phone