I have heard that 4 to 1 headers are more for drag use then street and that 4 to 2 to 1 is better for a dailu driver. Does anyone know what the difference between 421 and 41 and what should i put on my 97 ls integra

 

Now i am not positive so if someone comes and contradicts my info than believe them, but as far as i know, 421 headers will be better for daily drivers where power across the rpm range is ideal, u want low end power for stop light driving, and top end for entering the freeway or merging to the lane u want to be in, 4-1 headers will give u a better top end power but at the loss of low end power and will decrease the amount of torque ur engine has as the low end, because it decreased vacume pressure by decreasing back pressure, now all this makes perfect sense to me but in explaining it i may have lost a few thigns. for a daily driver ur better off with a 421 and ur better off with ur vtec, as with an all out drag car (which our lil honda's are not really made for) a vtec killer camshaft/s and a 4-1 may be more ideal at a loss of fuel economy and a decreased torque, now i may be wrong so dont quote me on this. anyone who knows more about this subject please let me know also

 

oh and on ur ls integra id suggest staying with a 421 because the torque is required for ur car to move at a decent rate because it is heavier, on my lil crx well.... torque doesnt count for much cuz we hardly have any so we try to maximize top end power. good luck buddy

 

That is a concern of minie i dont want to loose tork. I have a AEM cold air intake, magnaflow exaust, and a comptech clutch and it pulls good but i want to be able to burn preluds, i want to complete the system with headers and a cat back.

 

woops splet torque tork

HHAHAHAHA

 

id suggest looking for a gsr head to do a minimeswap or look into ur options for engine swaps or turbo/supercharger/n2o setup