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Q 1 , other than looks with different size rotors between front & rear , the car should have the smarts to distribute the force , with a guesstimate that 70% of the braking is done at the front , the bias created by just upgrading the front where it makes the most difference makes sense Q 2 ...

You most likely wont clear the brembo's with stock wheels . A few 18" wheels fit ,Most 19" wheels designed for big brake clearance would easily clear the brakes as would stock Holden Redline and HSV wheels. Its kind of catch 22 where upgrading wheels , expensive larger tyres & brakes all add...

What do you think of using a heavy duty battery , wont that be better for both life span and better power ? I have used this in a lancer in the past ( heavy duty exide ) and everything was better , brighter lights , stronger cranking etc.

Good to know

This is too expensive for me ,but for people who can afford it Forgeline GA3R might be a good choice as it could possibly clear brembo's Image below on 18" wheels with 6 pot Harrop Calipers on Front 4 pot rear

Thanks for clarifying , what about from insurance perspective , do they payout , have you heard any horror stories? This would be a really good option as they are technically awesome ( forged and high strength design for heavy load) , but unfortunately looks like this deal was one time only by...

Thanks for the pics . Look like there is good clearance with the DRAG 37 wheels , are they available here ? I was thinking of the Holden OEM wheels as well , but aren't the spacers illegal in Victoria ?

Same here on my SS with 8000kms ,1 to 2nd is rough ( not always ) , but 3rd is smooth . I reckon it needs to put into slot in a way it likes but to be honest I have not been paying too much attention to this. Regds the clutch has very little feel even compared to light corolla type cars ...

Based on some research found some rims that would fit Brembo brakes - Not sure about Enkei , but the rest of the wheels should fit Brembo's and even possibly AP Racing. 18 " Wheels ( Name Width Offset) Koya SF01,SF03,SF05 8.0 Custom BBS SR 8.0 32 SX 8.0 30 TSW Nurenberg 8.0 35 Team Dynamics...

I agree with on this especially with a heavy car large brakes would be confidence inspiring, it would be interesting to know how much of a difference a a good brake pad makes on the stock 2 caliper Or a rotor upgrade on the stock 2pot caliper is worth it

Awesome information thanks Grennan , I have started a thread @ https://forums.justcommodores.com.au/threads/18-wheels-to-fit-brembo-or-ap-racing-package.266115/#post-2912897 to check for 18" wheels available in Aus that accommodate big brake kits.

I guess my query boils down to 2 things . Any help in either would be much appreciated. 1. Is the big brakes necessary over stock brakes for street? If so how much better and is there any data to support it? Based on 100-0 stopping distances for comparison 2016 SV6 Wagon Auto - Stock 2...

I will be sending email to Koya. Thanks Sean880,good to know about rules about using only the stock brake packages. How do guys like Harrop , Walkinshaw and many others sell their 6pot / 4 pot combo ?

Thanks mate , do you know the model details , I was thinking an 8.5" wide wheel would be optimal.

I find the stock brakes on my VF2 SS LS3 ( 2 piston front / 1 piston rear) sedan in manual not confidence inspiring and planning to upgrade to a big brake kit. However l want to stay with 18" rims due to comfort and keep tyre costs down. Looking for answers from folks who already have done a...