Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

Stillen Gen 1 vs Gen 2 Sedan Catback

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Old 10-25-2014, 05:03 PM
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Stillen Gen 1 vs Gen 2 Sedan Catback

Is there a way to distinguish the Stillen Gen I from the Gen II Catback for the sedan?

On Import Parts Pro and Concept Z Performance, they have the same Stillen Stainless Steel Catback for the sedan listed for $1,069, and the description claims 23 hp gains, while the exhaust listed on the Stillen website claims 9 hp gains, for the same price.

They also note on Stillen's site: "03-06 Generation 1 - This is a louder system than our G35 Coupe or 350Z systems and makes substantially more power than either of those.

03-06 Generation 2 - New and improved - Same great power now with a quieter tone. The original system yielded tremendous power but at a higher sound level than we typically look for."

Are CZP and IPP selling the Gen I while Stillen is selling the Gen II? It seems unbelievable that they could claim 23 hp from a catback, and then lose 14 hp when they made Gen II quieter.

Any thoughts or experience to share?
 
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Old 10-25-2014, 05:12 PM
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Update: On IPP: "Features:

Years: 03-06
Generation 2 - Cat-Back - All Trims (Including AWD)"
Are the claims for the Catback (21-23 hp) accurate or manufacturer fluffery to sell the product? Is the change from Y-pipe single to X-pipe dual exhaust really going to make a difference of more than 10 whp?
 
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Old 10-26-2014, 01:58 PM
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G35 sedan w/ too much money in mods
Most likely fluffery, I only gained around 15 HP when I installed my Motordyne VQ/XYZ combo and I trust Tony's research a lot more than Stillen engineers.
 
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Old 10-26-2014, 02:08 PM
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We do sell the newer Gen 2 exhaust.

The description is normally just a cut and paste from what Stillen had when it was first listed. They have obviously gone back and made more realistic claims on the Hp and Tq.

I have gone in and corrected my listing

If you would like a quote on the exhaust, shoot me a PM with your zip code and I will quote you a forum price ;-)
 
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