its a 1995 GSR motor.
planning to get 11.5 or 12.0 compression pistons and forged rods, with after market cams/gears, and valve train, intake manifold w/ intake, headers. want to go with straight 2.25 mendrel bent custom piping, but is it big enough for that build up? i seen people puttin 2.5 piping a lot, but whats so wrong with 2.25 piping? will it not let the engine expel gas as much?

 

go with the 2.5in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fmrprojects &raquo;</TD></TR><TR><TD CLASS="quote">go with the 2.5in.</TD></TR></TABLE>

 

i heard 2.25 is good up to about 300hp, high 2 hundreds.

 

2.5", best exhaust size for na imo, and open header for the drag strip

 

i already paid for the 2.25 inch piping already... would there be problems with it? will it be choking the motor?

 

i dont think you will have problems with the 2 1/4 piping. benen's green hatchback has 2 1/4 piping (or it had) and it was puttin out 205 HP to the wheels and ran a mid 13 with it. so i dunt think 2 1/4 will have problems.