VS Exhaust 5L - Feedback and Info PLEASE HELP!!!!

[caspa]

Hey guys im looking at modifying my exhaust to get better flow...
I have a HSV VS Manta 185i 5 Litre and it has standard extractors, twin hsv mufflers, single cat and it has been modified to go to twin pipes at the rear...

I am getting a set of pacemaker extractors and probably keep the 2 1/2" system.

but i am not sure weather to go twin or single hi flow cats... also should i go ceramic or metal??? will there be backpressure problems or any other problems???

My car has a stall converter 2,500, 3'9 diff gears, transcooler, shift kit and i am getting a 286 crane cam and dyno tune so i want to get the exhaust micky mouse before i send it in to get the cam and tune

Cheers Guys

Caspa

[karlos]

yeah pacemakers are the go.change the cam and get it tuned with standard exhaust on and get a power read out.now when you put the extractors and exhaust on you can actually see what your modification has made to power out put.

[Wagon_Wheel]

I wouldnt really bother too much man, your much better off getting a new exhaust.
Twin cats are the way to go, with a twin 2.5" to match.
Could prob get away with a single 3" with that setup though. What ever happened to that twin system you were telling me about? That was cheap why not go for that

[Troy5L]

i heard off a mate that one of his mechanics told him that the hiflow cats arent good unless your chasing alot of power, and also said stock ones will do fine/flow the sameish on a stockish 5l

[caspa]

I wouldnt really bother too much man, your much better off getting a new exhaust.
Twin cats are the way to go, with a twin 2.5" to match.
Could prob get away with a single 3" with that setup though. What ever happened to that twin system you were telling me about? That was cheap why not go for that

Hey man went down there and the system is no longer available... apparently there isnt enough market for late holdens... im spewing... i got quoted $1400 for a set of hi flow cats (metal) and pacemaker extractors installed... does that sound fair????

other wise i got quoted $1200 for a single hi flow cat (metal) and paceys at another joint....

[Wagon_Wheel]

Hmmm yeah, if they are decent cats, the cats on there own are worth anything between like 200-600 each. But all depends what they are

[VZHSV]

id def go the twin highflow cats (metal) as ceramic are sposed to crack so ive heard.
ud be better off with a twin 2.5" system making it kinda mod proof just incase ur chasing even bigger power later down the track . i paid 285 each for my metal highflow's and 600 for my twin 2.5" all the way in mild steel but . i think ur getting a reasonable deal wth the pacemakers

[caspa]

ok new plan of attack i am thinking of going a set of difilipo extractors and twin hiflow cats.. are the mufflers ok with this setup or will i have issues? if they work just as well id rather keep em... im running a come csbh 462 cam + valvesprings and injectors... not running compression its just running stadard so i want the exhaust to increase the power!