Set of valve springs for PHGR of M/ s. AAL/ BT. Set consists of two items as follows. 1 ) Valve spring ( type- I ) to M/ s. AAL/ BT ' s part No. S3213/ G3213. Qty/ set. = 01 No. 2 ) Valve spring ( type- II ) to M/ s. AAL/ BT ' s part No. S3216/ G3216. Qty/ set. = 01 No.