98 LeSabre

[Tubo Boy]

My first car will be a 1998 Buick LeSabre with the n/a 3800, 205hp, 225ft/lbs. It went 15.5 @ 92 on my cousins g-tec. I wanna save up for a Gn but in the mean time i would like to do some small mods to the lesabre. Maybe K&N filter, And a Flowmaster muffler. should i just get a stock replacement filter or a connical. I have no clue what connnical filter will fit. Also could i just cut out the stock muffler and bolt in a new flowmaster. Does it need to be welded, and anyone know what size are the pipes. Would i see any improvment with a volt booster. Any other mods>?

 

[Tubo Boy]

I forgot to mention it has the grand touring package. Stiffer springs, shocks, sway bars, higher gears i think 3.44 insted of 3.08, and i think a tranny cooler.