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I am getting ready to order this setup and just want to make sure I've got everything covered.

16 - valve seals - 12210-PZ1-004 & 12211-PZ1-004 (8 of each)
16- yellow outer spring - 14761-PCX-003
16 - red inner spring - 14752-PRB-A01
32- valve cotter - 14781-PRB-A02

I've already got the 14765-PRB-A01 retainers on my Si which will only have about 20k miles on the car when I get everything installed. Am I missing anything here?
 

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There are a lot of benefits in running aftermarket springs especially with aftermarket camshafts.

Cams and springs are rarely matched perfectly unless engine builders are willing to pay $100 -$200 per spring for starters so it is always a compromise of mass produced springs.

So if you are running a cam that calls for 80 psi for example, if you were to test 100 springs, you would see 75-85 range

Its a good idea to run a stiffer spring for performance because at 9000 RPM, with OEM springs there is real communication between cam and spring

So if you are going to get into the trouble of changing springs, I would go with aftermarket instead for a good chance on making gains vs what you had before. Oem has a low rev limit so no matter how you mix or match the OEM springs they will never match the power of properly selected valvetrains for aftermarket cams

For your cams, I would go with these Supertech Part Numbers


springs part # SPR-H1021D
Retainers part# RET-K20A2/T2
Valve Lock part # KPR-5.5/7A
Seats Locator part# SEAT-H1020DS

Good luck
Nikos
 
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