71ANTICARB

iTrader: (23)

Hey guys I have an 05 m6. It has (all done by previous owner at HPE) Comp cam XE-R .605/.609, UD, Kook's LT's and mid w/ hi flow cats, Magnaflow catback. It was dyno tuned at 437hp. It also has Pedder's rear kit but I don't know the specifics on it.

My question is at what horsepower levels do you need to do other mods/upgrades to support the HP?

svede1212

iTrader: (3)

Depends on what you're going to do with it. Cruise around, roll race, drag race, AutoX?

ULTIMATEORANGESS

iTrader: (4)

id get your IRS stronger.

71ANTICARB

iTrader: (23)

I'd like to do some drag racing and would really like to do some road course, not competitive just for fun. It is my DD so I would like to error on the safe side and also don't want it to "feel" like a racecar (I drive 100+ miles daily).

71ANTICARB

iTrader: (23)

I forgot to mention it does have 3.91 gears. And a CAI.

ULTIMATEORANGESS

iTrader: (4)

theres kits to make your IRS stronger and handle better. you said you have pedders thats supposed to be good. for road racing id look into some shocks/struts and maybe some wider tires and rims though you might need to roll your fenders.

svede1212

iTrader: (3)

I'm not sure what extent your "Pedders rear" is altho I'm a fan of replace the inner and outer rear control arm bushings to help with control arm control and camber issues. Any brand will do. I would think that you would be well served all around with springs (I'm partial to Lovells 20mm drops), front strut bushings/bearings with bump stops, front radius rod bushings and new dampers all around. It will help a lot on the street/track and for the strip some drag bags added to the new springs to aid with wheel hop. In the rear billet axle stubs can be very important as they can snap drag racing and are a PITA to get out it they do. New differing diameter "anti-wheel hop" half shafts are said to help a lot with hop and offer a stronger shaft. The cages on the stock ones are prone to break under high traction/hard launch conditions. If you shift it hard a different shifter would be on my list too as the Hurst has issues.