Max 98 Stock or Aftermarket Exhaust Header?

[rvalente]

Hi guys,

This is my First post here.

I own a Max 98 GXE A/T with VQ30DE engine.

I checked on Ebay and Amazon for Exhaust Header. My Max is already upgraded with the Injen CAI and now it's time to upgrade the full Exhaust starting on the header. I just wish to tuning it very basically like the Injen + Unichip/AEM PiggyBack + Exhaust.

The question is : Those Ebay Y-pipe + Header worth the change or just let the Stock Headers and change only from the Catco area till the Muffler?

Like this one : http://www.ebay.com/itm/Exhaust-Headers ... 5890855e9a

What is the diameter I must use to avoid the car loss the backpressure and also loss some torque in low/mid rev ? 2.25 ou 2.5 Inches?

P.S. : sorry for my english, I live in Brazil and English is not my primary language.

Thanks in advance

Best Regards!

Rafael Valente

[rvalente]

No one? It's a simple question guys, should I leave the stock exhaust header or use a Inox one?

Thanks!

[97VQ30DE]

If you are not going Forced Induction anytime soon, just leave the stock exhaust manifolds.

[rvalente]

If you are not going Forced Induction anytime soon, just leave the stock exhaust manifolds.

Great to know that.

I just leave the stock Manifold + Stock Y-pipe. I created a custom B-Pipe with a custom resonator and leave the exhaust in 2.25 inches. I`m waiting the N1 Muffler in Inox to arive to swap.

My intake I put back to the Stock, I felt it more low end torque and power than the Injen. Nows the car passes thru 110mph, Injen just stuck in that speed, the stock I was able to reach 135mph.

Best Regards!

Rafael