brake budget clarification please

" or, if non-OEM front and/or rear subframes/axles/hubs/knuckles are used, the year, make, model, and trim of the donor vehicle listed as an application in a major parts catalog."

So, I can fabricate or buy some rear brackets to adapt disc rotors and calipers from an Mk2 golf or some such car to my e21. The way I read the new rules is that the calipers, brake lines, and brake pads are budget exempt as long as they are factory replacement equivalent to whatever I have adapted. The only budget hit would be the brackets to adapt the calipers, and whatever machining cost may be to fit the rotors. Am I reading this right?

If this isn't the case I'll try to figure out a way to budget them in, or just wait to install them until after the Challenge.

Are they a significant upgrade? Thats the intent of the rule. Allow free safety, but not free upgrades. 

Like, for example: mazda 626 v6 front brakes are a bolt on to a protege. They are a budget big brake kit. But NOT stock replacement. However, tge explorer rear axle in the amc came with rear discs. The flex line was cracked. It was budget exempt of a new flex line, as i bought the axle and brakesin the budget for the upgrafe part, but brought them back to sage under the exemption. 

Hopefully that makes sense

Not really an upgrade for the Challenge since it's only autocross and drag race. If anything it will potentially just add weight. The rear stock drums actually are plenty good from the factory, but require adjustment. I am only planning to swap for the ease of pad maintenance and if I ever put the car on track for multiple hard laps it would possibly help with fade. When I bought them I had no plans of installing until after the Challenge, but the rules kinda made it sound like this is kosher if done the right way.

What I’m doing is making sure I have the original parts I’m adapting. For example I bought an 86 RX7. I’m going to use the rear brakes from it. So the adapter I make is added to budget. I’ll use the calipers and rotors as mock ups. They are included in my purchase of the RX7. After mock up I can replace the RX7 brake components without budget hit. 

What I would not do is go buy brand new Lamborghini rear brake components. Make an adapter for them and say the brake components are exempt. 

You can only change the brakes if you upgrade the whole knuckle. For instance, my Accord came with drums in the rear. Rear knuckles are $40 each at the junkyard, so I'm +$80 into the budget, but I can put the brake hardware on at no cost. However, I can't build a bracket for $8 to adapt disks to the drum knuckle without paying for brake parts. 

So if you put Mk2 Golf knuckles on then you can run those brakes at no cost above the knuckles, but an adapter to the current knuckle doesn't make the brake parts budget free. 

That's my understanding anyway. 

EDIT: Stampie brings up a good point, if you've paid for the old gnarly brake components elsewhere you should be able to substitute as new without taking a hit. 

I'm intending to build a brake system from components that came on my Corolla or the Miata drive train drop out stuff I got from Klodcrawler. The only extra cost will be any adapter brackets I have to fab up. All of the grotty parts were paid for and will be in my budget, but may be replaced with new like components. As long as captainawesome has the original VW brake components' cost in the budget he's good. I would not read much into the word "upgrade" as any change can be deemed an upgrade. Example,I'm considering putting smaller lighter parts on to reduce rotational weight because the car is primarily aimed at autocrossing, but the braking capability will be reduced because the thin rotors won't absorb much heat. That's still an "upgrade" in my mind.

In reply to Dusterbd13-michael :

Wait what generation protege do they bolt up to? I've never heard of this being done to BG cars. 

My 2002 protege5 had it. And both my 03s