trinituner.com

since you are on that topic... i wanted to know if i should also change to 2 inch piping. i have stock 4G92 with stock extractors and a muffler

some very good info wrote:
For all engines from 1.0 - 1.5 litre, especially the smaller 8 and 12 valve engines we recommend :-

For 90% of people with mild modifications a 2" press bent system would do the job perfectly. Mandrel bent would produce no credible gains for your application other than giving you a larger bill.
For those with larger modifications like some of our stage 2 upwards modifications, 2" mandrel bent is the perfect size where air flow volume is a lot greater with items like twin throttle bodies, or camshafts stage 2 etc.
For those with race style system in naturally aspirated form like a quad TB system, 60mm Twin TB system etc, then a 2 1/4" mandrel bent system is as large as you would want to go.
For those with our turbocharger kits you would be recommended to run either a 2 1/4" mandrel bent system or a 2 1/2" press bent system. Any larger is again, a waste of time and money.

For all engines from 1.6 - 1.8 16v litre engines we recommend :-

For 90% of people with mild modifications a 2 1/4" press bent system would do the job perfectly. Mandrel bent would produce no credible gains for your application other than giving you a larger bill.
For those with larger modifications like some of our stage 2 upwards modifications, 2 1/4" mandrel bent is the perfect size where air flow volume is a lot greater with items like twin throttle bodies, or camshafts stage 2 etc.
For those with race style system in naturally aspirated form like a quad TB system, 60mm Twin TB system etc, then a 2 1/4" mandrel bent or 2 1/2" press bent system is as large as you would want to go.
For those with our turbocharger kits you would be recommended to run a 2 1/2" mandrel bent system. Any larger is again, a waste of time and money.

For all naturally aspirated 2.0 16v and larger 4cyl engines, along with up to 2.5l V6 24v engines we recommend :-

For 90% of people with mild modifications a 2 1/2" press bent system would do the job perfectly. Mandrel bent would produce no credible gains for your application other than giving you a larger bill.
For those with larger modifications like some of our stage 2 upwards modifications, 2 1/2" mandrel bent is the perfect size where air flow volume is a lot greater with items like twin throttle bodies, or camshafts stage 2 etc.
For those with race style system in naturally aspirated form like a quad TB system, 60mm Twin TB system etc, then a 2 1/2" mandrel bent or 2 1/2" press bent system is as large as you would want to go.
For those with our turbocharger kits you would be recommended to run a 2 1/2" - 3" mandrel bent system. Any larger is again, a waste of time and money.


For all naturally aspirated 3.0 V6 engines and larger we recommend :-

For 90% of people with mild modifications a 2 1/2" press bent system would do the job perfectly. Mandrel bent would produce no credible gains for your application other than giving you a larger bill - mostly for the 3.0 sedan and 4wd vehicle.
For those with the 3.5V6 and planning on modifying the vehicle, 2 1/2" mandrel bent is the perfect size where air flow volume is a lot greater with items like twin throttle bodies, or camshafts stage 2 etc.
For those with race style system in naturally aspirated form like a quad TB system, 60mm Twin TB system etc, then a 2 1/2" mandrel bent or 2 1/2" press bent system is as large as you would want to go.
For those with our turbocharger kits you would be recommended to run a 2 1/2" - 3" mandrel bent system depending upon the boost level and choice of noise.

illumin@ti wrote:i think is a language barrier issue.... somthing gettin screwed up in the spanish to english translation.... i pray to god he means resonator. but then again........explosive power he lookin for