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vz ss exhaust options

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stealthv8

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Sick response people leann towards difillipo..hope theyr still loud tho? yeh xforce is a bit nasty. canon bahahah. so 3inch system.. if not forced inducted wont that b overkill i.e no back pressure at all? pacies up front 4into 1 whats tha best size? 1 7/8 or is only gunna work wit 3" systm? is 1 3'4 to little? #### wish i could try b4 buy lol. n biggest cats possible or def 3"ers ne thing wrong with metallic cats? or are ceramics tha go? last 1s gutted cos they shat themselves tho. maybe tha full pacey system would be good. handfs up 3inch or 2.5??? cheers guys!!!!
 

Vt_vic

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if you want max power on a dyno the 1 7/8 with twin 3 will net you the biggest hp but low rev torque will suffer unless going big cam
 
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stealthv8

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how would 4 into 1 (1 7/8) go with 3" cats and 2.5 difillipo system? no cams in direct future maybe when $grows.? cheers
 
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stealthv8

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ok disregard previous comments please somebody is it true that a single 3" cat back system is better than a twin 2.5" cat back system???????
 
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stealthv8

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twin 2.5 cat back or twin 3 or single 3" arrrrgh wish i could try before buying damn help out tunerz?????
 

soop

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No thats not true.

For a totally standard 5.7, twin 3" is too big.
Single 3" is too small.

Twin 2.5" will flow enough to see over 450hp.
Bigger and you'll loose exhaust gas temperature and therfore velocity, smaller and you'll restrict the flow and loose velocity.
 
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stealthv8

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i will have pacies n hiflow cats tho. what if cam isnt that far off?
 
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stealthv8

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n pacey cats or difillipo?
2.5twin custom system mandrel bent guessns tha go then
 
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